HO Competent 4 pH Training 21R9

pH Training
Presentation 120 min
Process Instrumentation Training 2021
Oliver Niederheiser, Global Trainer SE PI
Confidential Property of Schneider Electric │ SE PI │Training
54 Slides in presentation
100 Slides in hand-out
Internal Use Only
pH Training
Training expectations
About training expectations, goals and extended version:
What is not part of the training content:
• After this training every attendee should be able to understand and
explain the technology, highlight the unique selling points and
choose the appropriate product for the customer application to
provide a quotation out of the Process Instrumentation portfolio.
• How to install, start-up our products or
identify issues within a measurement
and provide practical (hand-on) support
to customers.
(Please contact your SE sales manager
for a regional Specialist Training)
• “Competent Level Certification” provides documentation showing
an understanding of instrumentation technology and our advanced
features. (Competent Level certification is required before starting
Specialist Training!)
• Using the extended hand-out version of this competent training
provides additional in-depth knowledge of technology, application
and products.
• How to achieve sustainable sales
success in your regional industries,
markets & applications and identify the
matching sales strategy for local
customers and competitors.
(Please contact your SE sales manager
for a local sales strategy training)
For more training content please contact your local SE sales manager and/or
[email protected] (feedback highly appreciated)
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Page 2
pH Basics
pH Basics
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pH Basics
Definition
pH is defined as:
The negative, decimal logarithm of the
hydrogen ion activity in a (aqueous) solution.
+
pH = −𝑙𝑜𝑔10 𝑎(𝐻 )
Søren Peder Lauritz Sørensen
(9 January 1868 – 12 February 1939) was a
Danish chemist and head of the prestigious
Carlsberg Laboratory.
Sørensen 1909
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Page 4
pH Basics
Definition
pH is defined as:
The negative, decimal logarithm of the
hydrogen ion activity in a (aqueous) solution.
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Page 5
pH Basics
1. aqueous solution
What is pH?
pH is a number that describes the degree of
acidity or alkalinity of an aqueous solution.
(e.g. DIN19260)
pH 0
acid
pH 7
neutral
pH 14
base
No Water, No pH-measurement !
(Best >20% water, no measurement with less then 5% water)
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Page 6
pH Basics
2. hydrogen ion activity
Acids and Bases
The pH scale is determined by the dissociation of water:
H20

H+ (hydrogen ion) + OH- (hydroxide ion)
Ion product water: I25°C = (aH+) * (aOH-) = 10 -14
Acids dissolves in water and provide H+ ions:
HCl
H+ + ClHNO3
H+ + NO3HF
H+ + FBases dissolves in water and provide OH- ions:
NaOH
Na+ + OHKOH
K+ + OHNH4OH
NH4+ + OHExample: If you combine 3x NaOH + 2x HCl …
you’ll get a base: 3 OH- + 2 H+ => 2 H2O + 1 OHConfidential Property of Schneider Electric │ SE PI │Training
Page 7
pH 0
H+
O2
Na+ Cl- OHOH- NO3
Ca++
pH 14
pH Basics
3. decimal logarithm
Logarithmic function
Rule of thumb:
A difference of 1 pH-value,
make the acid/base 10x stronger.
(10ΔpH = 101 = 10)
The difference between an acid with
pH 1 and pH 5 is a factor of 10000!
(104 = 10000)
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Page 8
pH Basics
Conclusion pH definition
-
pH measurement only in aqueous solutions (min. ~20-30% water)
H+ + OH<=> H2O water
+
>H
=> acid
> OH
=> base
Difference of 1 pH => 10x stronger
Food
orange
juice
lemon
juice
Chemical
10000
tea
pure water
milk
egg white
beer
1000
100
10
13
14
2
3
5
6
7
8
9
10
11
12
4
1,7% NH4OH
4% NaOH
0,8% sodium bicarbonate
0,6% acetic acid
lime
0,02% NH4OH
0,3% HCN
0,4% HCl
1% potassium acetate
5% H2SO4
0
1
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Page 9
Nernst equation
why temperature matters
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Without integrated temperature measurement …
if the pH electrode provide e.g. 216 mV:
at 0°C (32°F) ~ 4 pH steps
at 90°C (194°F) ~ 3 pH steps
Measurement error 1 pH
pH Basics
Nernst equation
E = Eo + 2.3
where 2.3
𝑅𝑇
𝐹
𝑅𝑇
𝐹
Temperature dependence:
0°C (32°F) = 54.20 mV
25°C (77°F) = 59.16 mV
50°C (122°F) = 64.12 mV
90°C (194°F) = 72.06 mV
log aH+
=
0.1985 * TKelvin =
5°C (40°F) ~ 1 mV/pH
Slope for 1 pH-value @ 25°C (77°F) = 59.16 mV
Walther Nernst
(25 June 1864 – 18 November 1941)
was a German physicist, which won
the 1920 Nobel Prize in chemistry.
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Page 11
Temperature compensation is mandatory !!!
pH Basics
How big is the possible error without temperature compensation?
Temperature error table for pH signal
°C
5
15
25
35
45
55
65
75
85
2
0,30
0,15
0
0,15
0,30
0,45
0,60
0,75
0,90
3
0,24
0,12
0
0,12
0,24
0,36
0,48
0,60
0,72
4
0,18
0,09
0
0,09
0,18
0,27
0,36
0,45
0,54
5
0,12
0,06
0
0,06
0,12
0,18
0,24
0,30
0,36
6
0,06
0,03
0
0,03
0,06
0,09
0,12
0,15
0,18
pH
7
0
0
0
0
0
0
0
0
0
8
0,06
0,03
0
0,03
0,06
0,09
0,12
0,15
0,18
9
0,12
0,06
0
0,06
0,12
0,18
0,24
0,30
0,36
No temperature error
Temperature error < 0.1 pH units
Temperature error > 0.1 but < 0.3 pH units
Temperature error = or > 0.3 pH units
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Page 12
10
0,18
0,09
0
0,09
0,18
0,27
0,35
0,45
0,54
11
0,24
0,12
0
0,12
0,24
0,36
0,48
0,60
0,72
12
0,30
0,15
0
0,15
0,30
0,45
0,60
0,75
0,90
pH Technology
Combined pH Electrode
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pH Technology
pH electrode principle
Measuring
pH sensitive Glass
(Glass Membrane)
0.0001 mm
(0.000004”)
Reference
1 pH @ 25°C (77°F) = 59.16mV
Ag/AgCl
Reference
+
H+
H+
+
H+
Electrolyte
solution
+
+ +
+ OHCharge + + OHH+ OH- OH
Electrolyte
solution
Junction
Alkaline
Acidic
The surface layer of the glass membrane is the
“key performer” in each pH measurement!
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Page 14
The reference system is the “span of life”
in each pH measurement.
pH Technology
pH electrode
pH electrodes can technically distinguish:
membrane
•
Membrane glass type / Membrane form
•
Reference Junction / Reference system
•
Integrated temperature sensor
•
Solution Ground
•
Type of cable connector
•
…
BUT, they are interchangeable because they have:
•
Same diameter (1” or 12 mm)
•
Same process connection (3/4” or PG13,5”)
•
Same length (e.g. 12 mm: 120, 225, 360 o. 425 mm; 4.7”, 8.9”, 14.2” o. 16.7”)
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Page 15
pH Technology
Don‘t do:
pH electrode principle
•
•
•
•
•
pH Transmitter
Using 1 out of 2 sensors
Damaged cables
No contact to the media
Coated/blocked sensor(s)
Using damaged equipment (open wire, corrosion, …)
U
Measuring
Reference
Na+
Na+
H+
O2
NO3Cl-
OH-
Ca++
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Page 16
O2
H+
ClNO3OH-
Ca++
pH Technology
Death of an electrode
1. Destroy electrode
2. Destroy glass membrane
•
Breakage of glass
•
Chemical attack (e.g. Hydrofluoric acid)
•
Physical attack (Glass abrasion e.g. sand with high flow speed)
80% of all wear issues
are failure of the
reference system
3. Destroy reference
•
Reference poisoning (mostly anions like: bromide-, iodide- and sulphite-)
•
Reducing agents (mostly bisulfide- and ammonia)
•
Clogged reference junction
4. Extreme conditions (high temperature in combination with high pH values)
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Page 17
pH Technology
Death of an electrode
1. Destroy electrode
Solved with PEEK non glass body
2. Destroy glass membrane
•
Breakage of glass
•
Chemical attack (e.g. Hydrofluoric acid)
•
Physical attack (Glass abrasion e.g. sand with high flow speed)
3. Destroy reference
•
Reference poisoning (mostly anions like: bromide-, iodide- and sulphite-)
•
Reducing agents (mostly bisulfide- and ammonia)
•
Clogged reference junction
4. Extreme conditions (high temperature in combination with high pH values)
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Page 18
pH Technology
SE pH Electrodes
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pH Technology
Manufacturing Components
pH10
Glass membrane shapes:
pH12
PG13,5 Process
Connection
VarioPin Connector or fixed cable
1” PVDF-Body
Domed
wear proof
0 - 14 pH
VarioPin Connector
Nafion Reference
Flat (mostly for)
Abrasive media
Up to pH 12
RTD and
Solution Ground
¾” NPT Process
Connection
Protective Guard
Optional (only for HF applications):
SE antimony pH10 electrode
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Nafion Reference
Glass membrane
Glass membrane
Reference Junction
Page 20
12 mm PEEK-Body
(0.47”)
Reference Junction
pH Technology
Death of an electrode
1. Destroy electrode
Solved with PEEK non glass body
Protective Guard
2. Destroy glass membrane
•
Breakage of glass
•
Solved with SE
antimony pH electrode
Chemical attack (e.g. Hydrofluoric
acid)
•
membrane
Physical attack (GlassReduced
abrasion with
e.g. flat
sand
with high glass
flow speed)
Reduced with our Protective Guard
Flat membrane
3. Destroy reference
•
Reference poisoning (mostly anions like: bromide-, iodide- and sulphite-)
•
Reducing agents (mostly bisulfide- and ammonia)
•
Clogged reference junction
4. Extreme conditions (high temperature in combination with high pH values)
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Page 21
pH Technology
Reference & NAFION
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pH Technology
Junction, Poisoning and inner reference?
A reference system (therefore the whole measurement) fails, as soon as:
the inner reference is destroyed or
Junction
Inner Reference
the inner reference is block towards the process.
A reference junction could be blocked from the outside by particle from the media
or from the inside by chemical reactions and coagulation between media and inner reference.
In both cases, as soon as the inner reference is blocked from the reference, the measurement fails.
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Page 23
pH Technology
Poisoning and junctions
A reference system could be poisoned by different ions, e.g.: bromide, iodide and sulphide,
mainly known as electrode poisons.
Junction
Electrolyte
Inner Reference
As soon as the poisons reach the inner reference, they start to destroy the inner reference.
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Page 24
pH Technology
Poisoning and junctions
There are different solutions to increase the lifetime of a reference system (thus the whole electrode).
Adding junctions (typically one or two additional), to make it more difficult for the ions to pass.
Junction
Electrolyte
Inner Junction
Inner Reference
But again, as soon as the poisons reach the inner reference, they start to destroy the inner reference.
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Page 25
pH Technology
Poisoning and junctions
A different solutions to increase the lifetime of a reference system by increasing
the length of the ion path (in combination with additional junctions).
Inner Junction
Junction
Electrolyte
Inner Junction
Inner Reference
But again, as soon as the poisons reach the inner reference, they start to destroy the inner reference.
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Page 26
pH Technology
Poisoning and junctions
There are different solutions to increase the lifetime of a reference system (thus the whole electrode).
Adding junctions, to make it more difficult for the ions to pass or Increasing the viscosity of the electrolyte
to slow down the ions or increasing the length of the ion path.
Junction
Electrolyte
Inner Junction
Inner Reference
But again, as soon as the poisons reach the inner reference, they start to destroy the inner reference.
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Page 27
pH Technology
Why Nafion?
Nafion is a sulfonated PTFE (Teflon) discovered in the late 1960s by DuPont. It’s the
first of a class of synthetic polymers with ionic properties, which are called ionomers.
Nafion allow movement of cations+ but the membrane stops all kind of anions-.
Most electrode “poisons” are anions like bromide-, iodide-, cyanide- and sulphide- ions
and sulphide compounds such as cystine and cysteine or reducing agents like bisulfide.
These are the most dangerous ions for the span of life of your electrode.
This is a unique material to protect our pH reference system from mostly
electrode poisons or other substances which reduce the electrode life span dramatically.
You want to know more? http://en.wikipedia.org/wiki/Nafion
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Page 28
pH Technology
Nafion Reference
NAFION
Silver chloride (AgCl)
Silver (Ag) wire
KCl electrolyte
Customer say:
• “pH10 lasted 3 times longer than other sensors we tried in a very tough chlorine dioxide application.”
Boise Cascade
• “We were replacing Honeywell sensors every 2 weeks, pH10 lasted 6 months.”
Texas Eastman
• “My pH10 sensor failed in 3 weeks. But that’s 3 times longer than the ABB sensor we use.”
El Dorado Chemical
• …
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Page 29
pH Technology
Death of an electrode
1. Destroy electrode
Solved with PEEK non glass body
2. Destroy glass membrane
•
Breakage of glass
•
Solved with SE
antimony pH electrode
Chemical attack (e.g. Hydrofluoric
acid)
•
membrane
Physical attack (GlassReduced
abrasion with
e.g. flat
sand
with high glass
flow speed)
Reduced with our Protective Guard
Nafion Reference
3. Destroy reference
•
-, iodide- and sulphite-)
Reference poisoning (mostly anions
like:
bromide
Solved
with
NAFION
reference
•
Reducing agents (mostlyReduced
bisulfide- with
and NAFION
ammonia)reference
•
Clogged reference junction
Reduced with NAFION reference
4. Extreme conditions (high temperature in combination with high pH)
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Page 30
12 mm Body
pH Technology
Degradation because of extreme conditions
Slope degradation (>90% good, <80% out-of-spec)
Measurement system degradation (<60 sec. good)
% Slope degradation over time
Response time after high temperature cycles
120
350
100
300
DolpHin
Competitor 1
Competitor 2
250
80
200
60
150
40
100
20
50
DolpHin
Competitor 1
Competitor 2
12
16
22
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Page 31
0
0
0
6
# of days @ 100 C
25
0
6
12
16
# of days @ 100 C
22
25
pH Technology
Death of an electrode
1. Destroy electrode
Solved with PEEK non glass body
2. Destroy glass membrane
•
Breakage of glass
•
Solved with SE
antimony pH electrode
Chemical attack (e.g. Hydrofluoric
acid)
•
membrane
Physical attack (GlassReduced
abrasion with
e.g. flat
sand
with high glass
flow speed)
Reduced with our Protective Guard
3. Destroy reference
•
-, iodide- and sulphite-)
Reference poisoning (mostly anions
like:
bromide
Solved
with
NAFION
reference
•
Reducing agents (mostlyReduced
bisulfide- with
and NAFION
ammonia)reference
•
Clogged reference junction
Reduced with NAFION reference
Reduced with in
SEcombination
pH glass & NAFION
reference
4. Extreme conditions (high temperature
with high
pH values)
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Page 32
pH & ORP
Additional activity measurement
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pH & ORP
ORP (Oxidation-Reduction Potential)
•
Redox or ORP is a chemical reaction in which the oxidation states of atoms are changed.
(Just as pH represents the activity of the proton H+ in a solution,
ORP analogously represents the activity of the electron e-)
•
•
•
Any such reaction involves two parts:
•
a oxidation process
• Oxidation is the loss of electrons or
an increase in oxidation state
•
a complementary reduction process
• Reduction is the gain of electrons or
a decrease in oxidation state
ORP is the activity of the solution and is measured in mV, no temperature correction
Typical applications may be destruction of cyanide in MMM or chlorine control in cooling towers …
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Page 34
pH & ORP
Why use Redox (ORP)?
•
•
•
ORP is a convenient measure of the oxidizer’s or
reducer’s ability to perform a chemical task.
• Sodium sulphide (a reducing agent) will show a
negative ORP value (e.g. -180 mV)
• Chlorinated (an oxidizing agent) water will show a
positive ORP value (e.g. +300 mV)
ORP is by far a more consistent and reliable measurement than
e.g. chlorine alone. ORP tells you the activity of the dosed
agent, not only the concentration (e.g. conductivity).
ORP is a sum parameter. It shows the oxidation or reduction
effect of all substances together.
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Page 35
ORP value
350 - 500 mV
500 - 600 mV
600 - 650 mV
650 - 700 mV
> 700 mV
disinfection time
Up to 180 Min
3 - 10 Min
1 - 3 Min
Less than 1 Min
a few seconds
pH & ORP
Redox (ORP) electrode
Reference Electrode
Measuring Electrode
Reference
Noble Metal - Platinum (or Gold)
ORP Measuring Electrode
Measuring
Glass membrane for pH
(Same as in pH measurement)
Process
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Page 36
pH Measuring Electrode
Loop selection guide
Sensor, cable, transmitter & accessories
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Loop selection guide
pH Sensor Overview
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Page 38
Loop selection guide
pH10 Sensor choice
•
Domed and flat glass pH electrodes
•
With or without integral protective guard
•
Always integrated temperature sensor
•
Always integrated conductive PVDF (Kynar) solution ground
•
Ceramic reference junction with NAFION reference
•
Fixed cable or VarioPin connector
•
PVDF body with no metallic wetted parts
•
Domed: 121°C (250°F), 7 bar (100 psi), 0 to 14 pH
•
Flat: 85°C (185°F), 7 bar (100 psi), 2 to 12 pH
•
FM, CSA, ATEX, IECEx, NEPSI Certification
Flat
Solution ground
with RTD
Reference
junction
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Page 39
20-40 min steam pressure sterilization @ 121°C, ~2 bar (250°F, 30 psi)
Dom
Protected
Dom
Loop selection guide
pH12 Sensor choice
•
PEEK non glass body or standard glass body (only 120 mm)
•
Domed (high or std. temperature glass) and flat glass pH electrodes
•
pH or ORP or pH/ORP combination
•
Standard length for pH12 sensor from 120 to 425 mm (4.7 - 16.7”)
•
Always integrated temperature sensor
•
Standard conductive PVDF (Kynar) solution ground
•
Ceramic reference junction with NAFION reference
•
VarioPin connector
•
Domed glass: up to 140°C (284°F), 10 bar (145 psi), 0 to 14 pH
•
Flat glass: -25° C to +125°C (257°F), 10 bar (145 psi), 0 to 12 pH
•
FM, CSA, ATEX, IECEx, NEPSI, biocompatible Certification and 3-A compliant
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Page 40
4-10 min steam pressure sterilization @ 140°C, ~4 bar ( 280°F, 60 psi)
Loop selection guide
EP462A pH Sensor choice
•
Pure Water, low conductivity applications with less than 20 µS/cm
•
Recommended mounting
•
•
•
Available as EP463E:
•
0051180 flow chamber
•
EP463 twist-lock bushing
Optional: EP464A locking cap
Install downstream of conductivity cell
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Page 41
Loop selection guide
VarioPin cable (analog only)
•
•
The VarioPin (VP) cable provides up to 8 (gold plated) poles and allows simultaneous e.g.:
•
pH (meas. / ref.)
•
2- or 3-wire integrated temperature sensor (RTD)
•
Solution Ground (SG)
•
Redox (ORP)
•
Cable shield
only for analog sensors
VP plug is completely watertight (IP68 = 2m / 6ft. for 48h) in connected condition
and ensures a dustproof, watertight connection, even in harsh environments.
•
High temperature version (up to 125°C / 260°F) through the use of
PEEK material and is steam sterilizable and autoclavable.
•
Optional autoclave cap and extension cables available
•
Used by Schneider Electric, Yokogawa, Mettler-Toledo, Hamilton, Krohne, Knick,
Broadley-James, Emerson, Rosemount, Honeywell, and many more …
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Page 42
Loop selection guide
Transmitter overview
875PH Line Powered Transmitters
• 24 or 100 or 120 or 220 or 240V AC version
• Dual 4-20 mA outputs and dual alarm
• HART communications and DTM
• Diagnostics for sensor and transmitter
• 100 event logbook
• Panel, surface or pipe mounting
• CSA, IECEx, FM, UL or ATEX
• No longer available with CE marking (Europe)
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Page 43
876PH Loop Powered Transmitters
• 13 to 42 V DC with 4-20 mA and HART
• 4-20 mA HART, HART AMS and DTM
• Diagnostics for sensor and transmitter
• 100 event logbook
• Intrinsically safe
• Enclosure meets IP66 and NEMA 4X
• Conventional (-T) or SMART (-S) version
• Panel, surface or pipe mounting
Smart pH
Competitive
Matrix
Transmitters
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Page 44
Smart pH
Competitive
Matrix
Transmitters
(Cont’d)
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Page 45
Loop selection guide
Process Measuring Points
Static housing:
•
•
•
•
•
•
Side
Top
Direct (3/4” NPT)
Flow-through
Immersion
Bottom-up/Upside-Down
Retractable housing:
•
•
Side
Flow-through
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Page 46
Loop selection guide
FIT12 static mounting
• Guarded and unguarded static mountings & Retractable
• NPT fittings, ¾” and 1”
• Sanitary DN25 and Tri-clamp style
• NPT pipe adaptors, ¾” and 1”
• ANSI flanges, ¾” to 4”
• 316ss, CPVC, Kynar, Titanium materials
• Viton, EPDM, Chemraz, Kalrez, FFPM O-rings
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Page 47
Loop selection guide
pH10 mounting
•
•
•
•
•
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Page 48
1.25 inch, 316 SS ball valve retractable
Purgeable chamber
Redundant sensor seal
Assembly for user-supplied ball valve
Field adjustable insertion depth
Loop selection guide
BVA
Process Installation Accessories
The BVA Ball Valve Insertion and FIT12 Retraction/Insertion Assemblies allow insertion and
removal of sensors without opening a pressurized process. BVA has broad application across
sensor models while FIT12 is an economic solution for PH12 only.
Features
BVA
FIT12
Sensor
All pH and conductivity
models
PH12 Only
Valve, Pipe Nipple,
Purge Ports
Yes
No
Wetted Metals
316 ss or Titanium
316 ss or Titanium
O-Rings
Viton, EPDM, Chemraz,
Kalrez, or FFKM
Viton, EPDM, Chemraz,
Kalrez, or FFKM
Flange Option
Yes
No
Insertion Depth
Max 812 mm or Custom
375 mm with 425 mm
PH12
Removal Clearance
37.5 w 8-in insertion
61.5 w 32-in insertion
17.1 w 120 mm
29.1 w 425 mm
A broad offering of simple installation accessories for both PH12 and PH10 is also available
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Page 49
FIT12
Conclusion analog sensors
pH conclusion
Benefits of SE pH technology:
High Temperature
Reference Gel
Nafion Tube with
Internal Reference
Glass pH
Electrode
e.g. pH10
RTD and
Solution Ground
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Page 50
•
Longer Lifetime in challenging applications,
because of our unique NAFION reference
system.
•
High temperature gel delivers long life in
high temperature and temperature cycling
applications.
•
Fast response to pH changes with our glass
electrode.
SMART Technology
Analog or non-SMART Electrodes
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Smart or digital pH Sensor
General
•
Market has been trending from analog to digital sensors
•
15 years ago there were no digital sensors
•
Now the market (depending on the industry) is ~40% digital
•
A smart or digital pH sensor,
is a pH sensor with digital signal handling
and the possibility to store digital information
in the sensor.
Customers see the value in digital sensors and in some cases, demand this technology
• Digital sensors are not interchangeable, customer is limited to one supplier
•
•
Competitors offer Smart pH products
•
First was Endress+Hauser (E+H) with MemoSens
•
Followed by Mettler-Toledo with ISM
•
Yokogawa with SENCOM
•
Emerson’s PERpH-X is no real digital sensor, it combines analog & digital
Digital sensors are the cornerstone of the movement toward “smart, connected products”
• But be aware there is no big difference if a digital or analog sensor fails in the customer application
Confidential Property of Schneider Electric │ SE PI │Training
Page 52
Global Market Overview
12mm pH sensors for chemical applications
Mettler Toledo
Foxboro
PH12-S
InPro 4200i
Endress + Hauser
InPro 4800i
CPS11D
CPS71D
Yokogawa
SC25F
Sensor Type
Digital available
Yes
Yes
Yes
Yes
Yes
Yes
Shaft Material
Glass, Peek
Glass, Titanium
Glass, Titanium
Glass
Glass
Glass
Temperature Range
-25 to 140°C (-13 to 284°F)
0 to 130°C (32 to 266°F)
-5 to 130°C (23 to 266°F)
-15 to 135°C (5 to 275°F)
-15 to 140°C (5 to 284°F)
-10 - 130°C (14 to 266°F)
pH-Range
0 - 14
0 - 14
0 - 14
0 - 14
0 - 14
0 - 14
Pressure resistance
max. 10 bar (145 psi)
max. 15 bar (218 psi)
max. 12 bar (174 psi)
max. 16 bar (232 psi)
max. 13 bar (189 psi)
max. 10 bar (145 psi)
Reference electrolyte
Gel
Polymer
Gel
Gel
Gel
saturated KCl
Junction / Reference
Double junction with NAFION Open junction with Argenthal Annular junction with Argenthal Annular junction with ion trap Double junction and ion trap Double junction and ion trap
Flat Glass available
Yes
Yes
Yes
No
No
No
ORP included
Yes
Yes
Yes
No
No
No
ATEX / FM / IEcEx
Yes / Yes / Yes
Yes / Yes / Yes
Yes / Yes / Yes
Yes / Yes / No
Yes / Yes / No
Yes / Yes / Yes
CSA / NEPSI / Inmetro
Yes / Yes / Yes
No / No / No
No / No / No
Yes / No / No
Yes / No / No
Yes / No / No
3A / EHEDG / Biocompatible
Yes / No / Yes
No / No / No
No / No / No
No / No / Yes
Yes / Yes / Yes
No / No / No
IP Protection
IP68
IP68
IP68
IP68
IP68
IP68
Solution Ground
Yes (non-metal.)
Yes (Pt or Ti)
Yes (Pt or Ti)
No
No
Yes (Ti)
Sterilizable
Yes
No
No
Yes
Yes
No
Sensor Diagnostic available
Yes
Yes
Yes
Yes
Yes
No
Confidential Property of Schneider Electric │ SE PI │Training
Page 53
Global Market Overview
¾” pH sensors for chemical applications
Mettler
Foxboro
PH10-S
InPro 4550VP
InPro 4501VP
Endress
CPF81D
Emerson
3500
Yokogawa
FU20F
No
PPS
0 - 130°C (32 - 266°F)
0 - 14
max. 8 bar (116 psi)
Polymer
Open junction with Argenthal
No
No
No / Yes / Yes
No / No / No
No / No / No
IP68
Yes (Ti)
No
Yes
No
PVDF
0 - 100°C (32 - 212°F)
1 - 14
max. 7 bar (100 psi)
Gel
Double junction with Argenthal
Yes
No
No / No / No
No / No / No
No / No / No
IP68
Yes (Ti)
No
Yes
Yes
PPS
-10 to 110°C (-10 - 230°F)
0 - 14
max. 10 bar (145 psi)
Gel
Annular junction with ion trap
Yes
No
No / Yes / No
No / No / No
No / No / No
IP68
No
Yes
Yes
Semi-Digital
PPS
5 to 120°C (40 - 250°F)
0 - 14
max. 7bar (100 psi)
Gel
Double junction
No
No
Yes / Yes / Yes
Yes / No / No
No / No / No
IP68
Yes
No
Yes
Yes
PPS
15 to 105°C (60 - 220°F)
0 - 14
max. 10bar (145 psi)
saturated KCl
Double junction and ion trap
Yes
Yes
Yes / Yes / No
Yes / No / No
No / No / No
IP68
Yes (Pt)
No
Yes
Sensor Type
Digital available
Yes
Body Material
PVDF
Temperature Range
0 - 121°C (32 - 250°F)
pH-Range
0 - 14
Pressure resistance
max. 14 bar (200 psi)
Reference electrolyte
Gel
Junction / Reference
Double junction with NAFION
Flat Glass available
Yes
ORP included
No
ATEX / FM / IEcEx
Yes / Yes / Yes
CSA / NEPSI / Inmetro
Yes / No / No
3A / EHEDG / Biocompatible
No / No / No
IP Protection
IP68
Solution Ground
Yes
Sterilizable
No
Sensor Diagnostic available
Yes
Confidential Property of Schneider Electric │ SE PI │Training
Page 54
Analog pH-electrodes
Cosmetic application example:
Customer need to adjust the pH value of a shower gel to pH 5.5
and therefore he need to do a calibration to the correct range.
Calibration requirements: 2-point calibration with pH 4 and pH 7
Perform a calibration
1. Step: Determine Zero Point
2. Step: Determine the Slope
For a zero point calibration you
need a pH 7.00 buffer solution.
For a slope calibration you need a
buffer solution (other than pH 7, to
cover your expected pH value,
for example pH 4.00)
[mV]
[mV]
200
200
Slope
pH
pH
7
7
-200
-200
pH Buffer 7.00
pH Buffer 4.00
3. Step: Repeat step 2 with different buffer if required
Confidential Property of Schneider Electric │ SE PI │Training
Page 55
4
Calibration “curve”
Analog pH-electrodes
Process Environment
Calibration Process vs. Laboratory
pH Sensor
• The zero point and slope are coefficients that
must be determined by calibration
• pH probes are susceptible to drift and must be recalibrated
frequently, at least monthly, often more frequently (weekly or daily).
• Calibration involves manipulation of solutions, beakers, stirrers things that are designed for use in a laboratory environment
not a process environment.
Now we’re getting down to why “Smart pH” is important!
With a pH sensor, unlike a pressure transmitter or
conductivity cell, you can’t just set it and forget it.
Confidential Property of Schneider Electric │ SE PI │Training
Page 56
Laboratory Environment
Analog pH-electrodes
Is there no better way?
Maintenance time &
interval depend on the
application and
what needs to be done:
• Remove sensor
• Cleaning
• Visual inspection
• Calibration
• 2 point
• 3 or more points
• Reinstallation
In total (for a proper work)
10-30 min per
measurement point.
Confidential Property of Schneider Electric │ SE PI │Training
Largest source of error in pH measurements comes from an imperfect field calibration
• Lack of knowledge, good working conditions, working space, …
• Not allowing readings to stabilize
• Performing single point verification, when a two-point calibration is called for
• Calibrating with a sensor which is approaching end of life
• …
Page 57
SMART Technology
Smart pH
Are you looking for a better, more cost efficient
and saver way to calibrate your pH sensors
in an optimized environment
•
•
•
USB patch cord connects sensor to PC
Simplifies sensor calibration
Improved diagnostics
Indicator light
pH10 or pH12 with new sensor connector
Smart connector only for digital sensors:
pH10S / pH12S
Confidential Property of Schneider Electric │ SE PI │Training
Page 58
SMART Technology
Introducing the Schneider Smart pH Product Portfolio
•
New features in the 876PH-S Smart Transmitter
• Backlit display
• Operable in 7 languages
• Sensor Service Prediction
PH12-S
• Sensor response time calculation
• PH12-S Smart, 12-mm, PG 13.5 sensor family
876PH-S
• Integral electronics with digital communications
• Manufacturing, calibration and diagnostic data stored in sensor memory
•
PH10-S
•
PC Interface
PH10-S
• “1-click” email of sensor history to Schneider pH expert
• Operable in 9 languages
Confidential Property of Schneider Electric │ SE PI │Training
Page 59
PC Interface
SMART Technology
Sensor overview
•
Sensor Information (e.g.)
•
•
•
•
•
•
•
Process Variables
•
•
•
•
•
•
•
Measurement type
Temperature type
Sensor electrode type
Manufacture date
Sensor in Service
Temperature resistance
pH
Absolute voltage
Temperature
Glass impedance
Reference impedance
Calibration
Log’s & Reference
Confidential Property of Schneider Electric │ SE PI │Training
Page 60
SMART Technology
Sensor Calibration Overview
Documentation:
•
•
•
•
•
•
Serial number, Type of Sensor, Model Code
Date, Calibration done by …
Buffer
Slope, Zero-point, Response time
Status of the sensor
Sensor time in service
A sensor that is trending toward end of life can be decommissioned
in the instrument shop before reinstalling it in the process
Confidential Property of Schneider Electric │ SE PI │Training
Page 61
Smart pH Transmitter
Smart pH Sensor History Log
• Can be viewed with transmitter,
DTM or host
• Can be exported as .csv file
• Can be emailed to
Schneider pH expert for review
with 1-click
1-Click Email Link
Confidential Property of Schneider Electric │ SE PI │Training
Page 62
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
25 03 2017 10:30 Connected Transmitter ID=DTM Sensor Runtime=0.00 Days
25 03 2017 10:43 Calibrated Slope=98.6 E0=9.3
25 03 2017 10:43 Response Time 24 Seconds
25 04 2017 09:50 Connected Transmitter ID=DTM Sensor Runtime=0.01 Days
25 04 2017 10:15 Calibrated Slope=98.1 E0=9.2
25 04 2017 10:15 Response Time 36 Seconds
25 04 2017 10:45 Connected Transmitter ID=237 Sensor Runtime=0.05 Days
25 05 2017 10:00 Connected Transmitter ID=DTM Sensor Runtime=29.52 Days
25 05 2017 10:23 Calibrated Slope=96.2 E0=7.0
25 05 2017 10:23 Response Time 36 Seconds
25 05 2017 10:55 Connected Transmitter ID=237 Sensor Runtime=30.05 Days
25 06 2017 10:55 Connected Transmitter ID=DTM Sensor SRuntime=61.05 Days
25 06 2017 11:08 Calibrated Slope=93.0 E0=4.4
25 06 2017 11:23 Response Time 56 Seconds
25 06 2017 11:40 Connected Transmitter ID=237 Sensor Runtime=61.09 Days
25 07 2017 09:37 Connected Transmitter ID=DTM Sensor Runtime=91.00 Days
25 07 2017 09:50 Calibrated Slope=88.0 E0=-0.7
25 07 2017 09:50 Response Time 82 Seconds
25 07 2017 09:50 Alert! Sensor Service Required in 47.91 Days
25 07 2017 11:08 Calibrated Slope=96.5 E0=5.7
25 07 2017 11:08 Response Time 33 Seconds
25 07 2017 11:40 Connected Transmitter ID=237 Sensor Runtime=91.09 Days
Smart pH Transmitter
Smart pH Sensor History Log and Sensor Service Prediction
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
History Log Entries
Description
25 03 2017 10:30 Connected Transmitter ID=DTM Sensor Runtime=0.00 Days
25 03 2017 10:43 Calibrated Slope=98.6 E0=9.3
25 03 2017 10:43 Response Time 24 Seconds
25 04 2017 09:50 Connected Transmitter ID=DTM Sensor Runtime=0.01 Days
25 04 2017 10:15 Calibrated Slope=98.1 E0=9.2
25 04 2017 10:15 Response Time 36 Seconds
25 04 2017 10:45 Connected Transmitter ID=237 Sensor Runtime=0.05 Days
25 05 2017 10:00 Connected Transmitter ID=DTM Sensor Runtime=29.52 Days
25 05 2017 10:23 Calibrated Slope=96.2 E0=7.0
25 05 2017 10:23 Response Time 36 Seconds
25 05 2017 10:55 Connected Transmitter ID=237 Sensor Runtime=30.05 Days
25 06 2017 10:55 Connected Transmitter ID=DTM Sensor Runtime=61.05 Days
25 06 2017 11:08 Calibrated Slope=93.0 E0=4.4
25 06 2017 11:23 Response Time 56 Seconds
25 06 2017 11:40 Connected Transmitter ID=237 Sensor Runtime=61.09 Days
25 07 2017 09:37 Connected Transmitter ID=DTM Sensor Runtime=91.00 Days
25 07 2017 09:50 Calibrated Slope=88.0 E0=-0.7
25 07 2017 09:50 Response Time 82 Seconds
25 07 2017 09:50 Alert! Sensor Service Required in 47.91 Days
25 07 2017 11:08 Calibrated Slope=96.5 E0=5.7
25 07 2017 11:08 Response Time 33 Seconds
25 07 2017 11:40 Connected Transmitter ID=237 Sensor Runtime=91.09 Days
This entry represents 1st connection to the DTM in the factory before shipment.
Slope (%) and asymmetry potential (E0 in mV) are entered in the log.
The response time of the sensor when changing buffer solutions is entered.
The sensor is connected to the DTM in user's lab for check out and calibration before installation.
Slope and asymmetry are entered in the log.
Response time is entered in the log.
Sensor is connected to the transmitter at the measurement location.
Sensor is connected to the DTM in user's lab for monthly recalibration.
Slope and asymmetry are entered in the log.
Response time is entered in the log.
Sensor is reinstalled at the measurement location.
Sensor is connected to the DTM in user's lab for monthly recalibration.
Slope and asymmetry are entered in the log.
Response time is entered in the log.
Sensor is reinstalled at the measurement location.
Sensor is connected to the DTM in user's lab for monthly recalibration.
Slope and asymmetry are entered in the log.
Response time is entered in the log.
Slope has fallen below 90% threshold set by user and predicted to fall to 80% within 47.91 days.
User has cleaned and recalibrated the sensor. New slope and asymmetry are entered in the log.
New response time is entered in the log.
Sensor is reinstalled at the measurement location.
Confidential Property of Schneider Electric │ SE PI │Training
Page 63
SMART pH
Summary of Smart pH Sensor Benefits
• Smart sensors contain their vital information in internal memory and can upload their data into a transmitter, PC or other host.
• These vital data consist not only of calibration coefficients, but also “date of birth”, firmware revision, model code selection, sales order
number, serial number, time in service and the sensor history log.
• Smart sensors dramatically reduce downtime at measurement points.
• Instead of taking the measurement offline while calibration is carried out awkwardly in the process environment, a lab-calibrated
sensor can just be swapped into place and it’s calibration data will be uploaded to the transmitter.
• A stable of ready-to-deploy smart sensors can be maintained in a stockroom for quick replacement.
• The 876PH-S transmitter analyses sensor history in its Sensor Service Prediction feature.
Smart sensors that reduce costs!
• Less measurement down time by swapping in a calibrated sensor instead of calibrating in the process environment
• Longer lifetime and reduced need for servicing with NAFION ion barrier in pH10 and pH12
• Lower maintenance costs by servicing only when needed using Sensor Service Prediction
Confidential Property of Schneider Electric │ SE PI │Training
Page 64
SMART Technology
Adding SMART
•
Digital signal from sensor less prone to interferences than analog signal
–
•
Longer cable or less problem with signal handling because no high impedance signal
Sensor can be connected directly to a PC
–
Smart Sensor stores its calibration parameters in an on-board memory chip
–
Smart Sensor’s calibration gets uploaded to the field transmitter upon connection
–
Easy to use and to interpret the (raw-) values like glass- or junction-impedance
and compare them to the sensor history.
•
Less time is spent in the process areas
–
No liquid handling in difficult areas, so a safer solution
–
Cleaning & maintenance or off-site calibrations in a safe area (dual use principle)
Confidential Property of Schneider Electric │ SE PI │Training
Page 65
Smart pH
What is a Smart pH Sensor?
A smart pH sensor contains integral circuitry for signal amplification, A/D conversion, scaling, signal
transmission, storage of calibration coefficients, sensor identification and sensor history.
These functions were traditionally carried out in a remote transmitter.
Smart pH Sensor
Analog pH Sensor
Sensor Interface Electronics
Integral to sensor
In remote transmitter
Signal Output
Low-impedance digital
High-impedance analog
Interface cable
Thin, inexpensive, 2-wire, twisted pair,
one cable for all temperatures
Thick, expensive, high-insulation-resistance, multi-conductor,
low- and high-temperature versions
Maximum cable length
>100 m (>330 ft.)
<10 m (<33 ft.)
RFI/EMI Susceptibility
Low
High
Calibration storage
In sensor
In transmitter
Calibration location
Lab or instrument shop
Process measurement point
Calibration instrumentation
Transmitter or PC in lab or shop
Transmitter at measurement point
Sensor identity information
In non-volatile sensor memory
Label, tag, or sales order paperwork
Sensor history
In non-volatile sensor memory
None or customer maintenance paperwork
Confidential Property of Schneider Electric │ SE PI │Training
Page 66
SMART Loop selection guide
Sensor, cable, transmitter & accessories
Confidential Property of Schneider Electric │ SE PI │Training
SMART Loop selection guide
SMART pH10 Sensor choice
•
Domed and flat glass pH electrodes
•
With or without integral protective guard
•
Always integrated temperature sensor
•
Always integrated conductive PVDF (Kynar) solution ground
•
Ceramic reference junction with NAFION reference
•
PVDF body with no metallic wetted parts
•
SMART connector with fully digital signal handling
•
Domed glass: 121°C (250°F), 7bar (100psi), 0 to 14 pH
•
Flat glass: 85°C (185°F), 7bar (100psi), 2 to 12 pH
•
FM, CSA, ATEX, IECEx, NEPSI Certification
•
New SMART sensor connector and new patch cord
Confidential Property of Schneider Electric │ SE PI │Training
Page 68
Solution ground
with RTD
Reference
junction
SMART Loop selection guide
pH12 Smart Sensor choice
•
PEEK non glass body or standard glass body
•
Domed (high & std. temperature) and flat glass pH electrodes
•
pH or pH/ORP combination
•
Standard length for pH12 sensor from 120 to 425 mm (4.7 to 16.7”)
•
Always integrated temperature sensor
•
Standard conductive PVDF (Kynar) solution ground
•
Ceramic reference junction with NAFION reference
•
SMART connector with fully digital signal handling
•
Domed glass: up to 140°C (284°F), 10 bar (145 psi), 0 to 14 pH
•
Flat glass: -25° C to +125°C (257°F), 10 bar (145 psi), 0 to 12 pH
•
FM, CSA, ATEX, IECEx, NEPSI, biocompatible Certification and 3-A compliant
Confidential Property of Schneider Electric │ SE PI │Training
Page 69
SMART Loop selection guide
Transmitter overview
876PH-S Loop Powered SMART Transmitters
• 13 to 42 V DC with 4-20 mA and HART
• 4-20 mA HART, HART AMS and DTM
• Diagnostics for sensor and transmitter
• 100 event logbook
• Intrinsically safe
• Enclosure meets IP66 and NEMA 4X
• SMART (-S) version
• Panel, surface or pipe mounting
Confidential Property of Schneider Electric │ SE PI │Training
Page 70
Smart Interface for SMART pH
SMART Conclusion
SMART pH conclusion
Benefits of SE pH SMART technology:
•
High Temperature
Reference Gel
Longer Lifetime in challenging applications, because of our
unique NAFION reference system
•
High temperature gel delivers long life in high temperature
and temperature cycling applications
Nafion Tube with
Internal Reference
•
No liquid handling in difficult areas, so a safer solution
•
Pre-calibration in the instrument shop with perfect
working conditions, equipment, … for better calibrations
•
Software assist worker with SMART Diagnostics and
knowledge base … focused knowledge.
Confidential Property of Schneider Electric │ SE PI │Training
Page 71
pH Q&A
Accuracy
What will be the measurement accuracy
or on what does the accuracy of pH measurement depend?
•
Calibration (handling, stirring)
± 0,01 - 0,5 pH
•
Temperature compensation
± 0,01 - 1 pH
•
pH Range (depend on glass, e.g. acid/alkali error)
± 0,01 - 0,4 pH
•
Electrode (hours of use and slope/reference)
± 0,01 - 1 pH
•
Buffer solution accuracy
± 0,005 - 0,05 pH
•
Media / Solutions (e.g. low conductivity <100µS/cm)
± 0,01 - 0,8 pH
•
Assembly (proper position for measurement)
± 0,01 - 0,5 pH
•
Cleaning
± 0,01 - 0,2 pH
So what do YOU answer?
It depends …
Confidential Property of Schneider Electric │ SE PI │Training
Page 72
Realistic accuracy
•
•
Laboratory ± 0.05 pH
Process
± 0.1 pH
Depends mainly on sensor,
training and application
pH Q&A
Lifetime of a pH-Electrode
Electrode aging is considerable accelerated by:
Indirect ageing:
•
Incorrect handling of the pH sensor when not in use.
•
Earth leakage
•
Measuring strong alkaline solutions attack the pH sensitive glass membrane.
•
Oxidation or reduction
•
Using in high-temperature environments (> 60°C or 140°F).
•
Ingress of process medium
•
Electrode poisoning from bromide, iodide, sulphide ions, bisulfide or ammonia
•
Coated glass membrane
•
…
Lifetime:
•
Application at room temperature
1 - 3 years
Rule of thumb:
•
Application at 60-80°C (140-176°F):
several months
•
Application at 80-100°C (176-212°F):
several weeks
•
High temperature (>80°C / >176°F) and high pH
value (>pH 10) will extremely reduce the lifetime
A temperature increase of
10°C (18°F) halved the life
of the pH electrode.
several days
Measuring HF solutions (with wrong electrode)
several hours
•
So what do YOU answer?
Confidential Property of Schneider Electric │ SE PI │Training
Page 73
It depends …
Schneider Electric pH
Success calculator
2022 (just as an example):
• You visit 40 customer (in harsh applications) and talk about SE pH technology and NAFION
• 50% may be interested in a test: 20 customer request a trial sensor (for free)
• 50% have issues within their application and here NAFION is a solution: 10 customers
• These 10 customer use the electrode and try it internally at different applications / measurement points
• ~10 measurement points per customer / plant and with an average lifetime of 1 month
2023 (just selling spare electrodes):
• EUR: 10 customers * 10 measurement points * 12 sensors/yr. * 400 $ (LP) =
~480.000 $
(~500x IGP10S)
• US:
10 customers * 10 measurement points * 12 sensors/yr. * 500 $ (LP) =
~600.000 $
(~700x IGP10S)
Confidential Property of Schneider Electric │ SE PI │Training
Page 74
Abstract
Customer approach strategy
• Attack segments with harsh pH applications
• Chemical, Petrochemical, Pulp and Paper, Textiles, others
• Attack applications where competitive sensors fail (because of reference issue)
• Ask your customer for a calibration history of the old probe
• Attack accounts with large competitive installed base
• SE pH sensors provide an easy physical swap-out for competitive sensors
• Analog pH sensors can be changed (in most cases) without changing the transmitter or cable or mounting …
a low risk trial for a user
• Provide a seed program to accelerate side-by-side comparisons (contact sales / PM)
Confidential Property of Schneider Electric │ SE PI │Training
Page 75
Demo Kits
PH12
Demo Kits are available for both
PH10 and PH12
• Ordering Information
– PH12: Part number
B1280KF
– PH10: Part number
B1279XR
• Contents
–
–
–
–
Carrying case
Probe
PC Interface
Memory stick with Resource
Guide
Confidential Property of Schneider Electric │ SE PI │Training
Page 76
PH10
Customer applications
Some examples of measurements
Confidential Property of Schneider Electric │ SE PI │Training
CHEMICAL &
HYDROCARBON PROCESSING
Confidential Property of Schneider Electric │ SE PI │Training
Page 78
Application
Spray Tower Scrubber
•
Acid gas enters at bottom and flows upward
•
Caustic sprays downward counter to the gas
•
Neutralized acid/base salt water falls into scrubber sump
•
Cleaned gas flows up and out
•
Sump water re-circulates to spray nozzles
•
pH measurement controls addition of fresh caustic
Confidential Property of Schneider Electric │ SE PI │Training
Page 79
Application
Caustic Scrubber pH Measurement
Industry: Chemical
•
Challenge:
– Short electrode life
– Inaccurate pH readings caused overuse of caustic
•
Solution:
– PH10 technology
– Glass formulation is more stable, more accurate and lasts longer
– Nafion ion barrier protects reference against strong chemicals
Confidential Property of Schneider Electric │ SE PI │Training
Page 80
Application
Eastman Chemical Flue Gas Scrubber
• Requirement:
• Accurate measurement in highly alkaline solutions at elevated temperatures
• Ensure regulatory compliance
• Reduce chemical costs
• Solution:
• PH10 sensor with high-temperature glass:
•
•
•
•
•
Sensor life increased from 3-4 weeks to 6 months
Reduced equipment and maintenance costs by a factor of 8
Scrubber efficiency improved
Improved pH accuracy reduced NaOH consumption by 50%
Increases process efficiency by reducing downtime
Confidential Property of Schneider Electric │ SE PI │Training
Page 81
Pharmaceutical & Biotech
Confidential Property of Schneider Electric │ SE PI │Training
Page 82
Application
Drug Production pH Measurement
Industry: Pharma
•
Challenge:
– Unreliable pH sensors
– Aggressive chemicals
– Lab measurements required due to on-line sensor issues
•
Solution:
– 871PH Sensor with Kalrez O-rings
– Accuracy to +/- 0.03 pH
– Real-time pH measurements greatly reduce cycle time
Confidential Property of Schneider Electric │ SE PI │Training
Page 83
POWER
Confidential Property of Schneider Electric │ SE PI │Training
Page 84
Application
Forced Oxidation Gypsum pH Control
Industry: Power generation
•
Challenge:
– High temperatures (71°C / 160°F)
– High pH value
– Abrasive crystalline gypsum slurry
– Short sensor life, high maintenance costs
•
Solution:
– PH10 increased sensor life 5X
– Insertion assemblies for faster service
Confidential Property of Schneider Electric │ SE PI │Training
Page 85
Application
Pure Water – pH Application
• Power Generation
– Industrial plants
– Municipal plants
• Boiler Water
– High purity to prevent scaling
– Pure water is corrosive
• Trace Chemical Additions
– pH control of corrosion
inhibitor addition
– Protects capital equipment
Confidential Property of Schneider Electric │ SE PI │Training
Page 86
PULP & PAPER
Confidential Property of Schneider Electric │ SE PI │Training
Page 87
Application
Pasve pH Installation in a Tall Oil Plant
Flush water flow
Industry: Pulp and paper
•
Challenge:
– High temp. 75°C
– Keep electrodes clean from soap particles, lignin
– Unreliable measurement
– Electrodes lasted 1 month
•
Solution:
– Pasve mounting valve
– 871PH sensor
– 12 month electrode life
– Reliable pH measurement, auto control
Confidential Property of Schneider Electric │ SE PI │Training
Page 88
Application
Bleaching & Paper Machine
Confidential Property of Schneider Electric │ SE PI │Training
Page 89
Application
Waste Water Treatment
Rugged, fouling resistant pH
Confidential Property of Schneider Electric │ SE PI │Training
Page 90
SPECIALTY APPS
Confidential Property of Schneider Electric │ SE PI │Training
Page 91
Applications
Specialty Apps
•
Savannah River - nuclear materials
•
ADM – bio-fuels, ethanol manufacturing
•
Sony – acid etching of mirrors for television manufacturing
•
Las Vegas golf course – irrigation
•
Disney World – water treatment
•
U.S. Army – RDX explosives processing
Water is everywhere …
pH applications are everywhere
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Page 92
Please remember:
There are many competitors within wet analytical … ,
but we are the only who can provide the innovative pH reference system.
NAFION can extend your electrode life dramatically.
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Where to go for help?
Offer Manager:
Schneider Electric Process Instrumentation
Technical Assistance Center (TAC)
at Foxboro, MA, USA
https://pasupport.schneider-electric.com/
Mike Tutunjian
Offer Manager pH
[email protected]
+1 (508) 549 2324
By phone: +1 508-549-2424 (UTC -5h)
By email: [email protected]
Questions?
54 Slides in presentation
100 Slides in hand-out
https://ogy.de/TrainingLibrary
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Frequently Asked Questions
What is the IP (ingress protection) rating for PH12?
• PH10 and PH12 are rated IP68 with a submersion depth of 2 m for 48 hrs. This allows
for periodic inundation, but not continuous immersion.
Can PH12 be installed in a submerged condition?
• PH10 and PH12 are not designed to operate for extended periods while submerged
(see above—IP68), in other words you cannot just dangle the probe by the cable into a
tank or body of water. But we do offer installation solutions that meet this need. Since
PH10 has a ¾-in pipe thread on its upper body, it can be threaded into a plastic or metal
pipe for submersion applications (see right). A pipe adapter is available for PH12,
allowing similar submerged deployment (see below).
PH12
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Page 95
PH10
Frequently Asked Questions
How long can we store a PH12 sensor before putting it in use?
• Here is what is stated in both the PH10 and PH12 instruction manuals:
• To elaborate, ”excellent conditions” means with sensing tips in water or KCl solution as when it is
stored with its protective cap and at “ambient temperatures”, meaning the same temperatures you or I
would find tolerable.
• KCl is not essential, it’s the water that’s important. And if the sensor does dry out, it can be restored by
soaking for a few hours.
Protective cap with KCl solution
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Frequently Asked Questions
Can the 876PH-S be used with analog sensors as well?
Can other manufacturers’ sensors be used with the 876PH-S?
Can Schneider Smart pH sensors be used with other manufacturers’ transmitters?
• The 876PH-S is used with the smart PH12 (PH12- . . . S model codes) and smart PH10 (PH10- . S model codes)
only) and vice versa.
• The 876PH-T is used only with analog pH sensors and vice versa.
• Schneider Smart pH products are not compatible with other manufacturers’ products.
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Frequently Asked Questions
Is the backlit display available only on the 876PH-S?
• For now, yes, but the backlit display will be implemented on 876PH-T and other 876s in the not-too-distant future.
Are there plans to make smart versions of the 871A and 871PH sensors?
Are there plans to make smart conductivity sensors?
• The migration from analog to smart is part of a broad strategy within the business. However, timelines for specific
elements of that migration have not been developed, so it’s important to continue to treat our analog portfolio as a
vibrant one and promote products such as rebuildable pH sensors and contacting and non-contacting conductivity
sensors for the unique features that they bring to the market. They should not be treated as if replacements are
just around the corner.
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Frequently Asked Questions
When would one choose PH12 vs PH10?
• Here I have simply pasted some rows from the specifications a few slides back showing some of the main
differences between PH12 and PH10:
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Process Instrumentation
Training Library
https://ogy.de/TrainingLibrary
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Internal Use Only
Thank you
For questions or recommendations
please contact
Oliver.Niederheiser
@se.com
Global Trainer
SE Process Instrumentation
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