Page 1
Signet 275X Series Wet-Tap DryLoc® pH and ORP Electrodes
Signet 276X Series Differential DryLoc® pH and ORP Electrodes
Signet 277X Series Threaded DryLoc® pH and ORP Electrodes
*3-XXXX.090*
3-2764.090 Rev F 06/17
Operating Instructions
Description
Description
The 275X Wet-Tap, 276X and 277X electrodes are all-purpose sensors ideal for a wide
range of universal applications. They feature a unique foul-proof DryLoc
gold-plated contacts, designed specifi cally for use with the Signet 2750 and 2760 Sensor
Electronics and Preamplifi ers. These dependable and highly responsive electrodes
feature a large reference chamber volume and intelligent positioning of internal elements
that combine to extend the service life. The electrodes are offered with either fl at or
bulb sensing elements. The fl at versions allow sediment and particles to sweep past the
measurement surface, minimizing the risks of abrasion, breakage and coating. The bulb
versions can be used for general purpose applications and are also offered with a glass
or plastic body for use with the 3719 Wet-Tap assembly. The choice of a PT1000 or 3 K
temperature sensor allows compatibility into all Signet pH/ORP instruments.
English
®
connector with
• English
• Deutsch
• Français
• Español
• Signet 276X Series Differential pH and ORP electrodes feature a Ryton® body and
PTFE reference junction to resist fouling, clogging and chemical attack under harsh
chemical applications.
• Differential electrodes use a 3-electrode technique, measuring the pH and reference
electrodes against a ground electrode for a more stable output signal. The solution
ground eliminates noisy measurements by draining electrical current away from the
reference electrode. The reference electrode is housed in a glass half-cell embedded
in the reference chamber to protect it from poisioning or contamination. The electrolyte
chamber is refi llable and the salt bridge is fi eld replaceable.
• Signet 277X Series pH and ORP electrodes are highly responsive electrodes featuring
a PTFE double reference junction, with KNO3 in the front chamber (to block various
poisoning ions such as cooper (Cu++), lead (Pb++), mercury (Hg++)) and a large
reference chamber. The two chambers combine to extend the service-life of the
electrode.
• Both the 276X Series and the 277X Series feature a unique foul-proof DryLoc®
connector with gold-plated contacts designed specifi cally for use with the Signet 2750
and 2760 preamplifi ers, sensor electronics, and connectors. They are available with
either fl at or bulb style sensing elements. The bulb versions can be used for general-
purpose applications. The fl at versions allow sediment and particles to sweep past the
measurement surface, minimizing risks of abrasion, breakage and coating. All versions
can be installed at any angle.
• The temperature device in the pH electrodes is positioned at the tip of the
measurement surface, resulting in a temperature response of less than 1 minute.
Temperature devices available include 3 K, 300 , or PT1000 RTD.
Page 2
Warranty Information
218 mm
(8.57 in.)
35 mm
(1.4 in.)
11.9 mm
(0.47 in.)
Table of Contents
Refer to your local Georg Fischer Sales offi ce for the most
current warranty statement.
All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales offi ce or distributor.
Product returned without a Service Form may not be
warranty replaced or repaired.
Signet products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH buffers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature,
mishandling (e.g. broken glass,
chemical poisoning, dry-out) or
damaged membrane, freezing
and/or extreme temperatures).
Product Registration
Thank you for purchasing the Signet line of Georg Fischer
measurement products.
If you would like to register your product(s), you can now
register online in one of the following ways:
• Visit our website www.gfsignet.com.
Under Service and Support click on
Product Registration Form
• If this is a pdf manual (digital copy), click here
Warranty Statement ...................................................................... 2
Product Registration ..................................................................... 2
Safety Information.........................................................................2
Dimensions ................................................................................... 3
Specifi cations................................................................................3
Electrode Care and Application .................................................... 4
pH Electrode Calibration ........................................................... 4, 5
ORP Electrode Calibration ............................................................5
Maintenance and Cleaning ...........................................................6
Ordering Information ................................................................. 7, 8
Dimensions
2756 Wet-Tap pH
2757 Wet-Tap ORP
Electrode
Safety Information
• Do not alter product construction.
• Depressurize and vent system prior to installation
or removal.
• Confi rm chemical compatibility before use.
• Do not exceed maximum temperature/pressure
specifi cations.
• Wear safety goggles or faceshield during
installation/service.
• When using chemicals or solvents use appropriate body
and respiratory protection.
Caution / Warning / Danger
Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death
Personal Protective Equipment (PPE)
Always utilize the most appropriate PPE during
installation and service of Signet products.
Lubricate o-rings with a
non-petroleum based,
viscous lubricant (grease)
compatible with the
system.
45 mm
(1.8 in.)
277X Series
Bulb Electrode
276X Series
Differential
Electrode
1 in.
NPT
¾ in.
NPT
43 mm
(1.7 in.)
277X Series
Flat Electrode
¾ in.
NPT
32 mm
(1.3 in.)
121 mm
(5.27 in.)
2
Signet 275X, 276X, 2777X Series pH and ORP Electrodes
Page 3
Specifi cations
276X Series Differential Electrodes
277X Series Threaded Electrodes
General
Compatibility ......................... Signet 2750 and 2760
Shipping Weight ................... 0.25 kg (0.55 lbs.)
Operating Range ..................
276X Series ......................... 0 to 14 pH, ± 1500 mV ORP
277X Series .......................... 0 to 14 pH, ± 1500 mV ORP
Reference Electrolyte
276X Series ......................... Buffered KNO3 solution
277X Series ......................... KCI/AgCl gel with KNO3 salt
bridge
Reference Element
276X Series .......................... pH glass electrode
277X Series .......................... Ag/AgCl
Temperature Sensor .............
276X Series pH .................... 3 K, PT1000 RTD, or 300
277X Series pH .................... 3 K or PT1000 RTD
276X Series ORP ................. 10 K ID for Signet instruments;
PT1000 RTD or 300 options for use with other instruments
277X Series ORP ................. 10 K ID for Signet instruments
Wetted Materials
Body ..................................... Ryton
®
Reference junctions .............. PTFE
Sensing surface .................... Glass (pH), Platinum (ORP)
O-rings .................................. FKM
Solution ground .................... Carbon graphite
(276X series only)
275X Series Wet-Tap Electrodes
General
Compatibility ......................... Signet 2750 and 2760
Shipping Weight ................... 0.25 kg (0.55 lbs.)
Operating Range .................. 0 to 14 pH, ± 2000 mV ORP
Reference Electrolyte ........... Polymerized Acrylamide Gel
Wet-Tap electrolyte ............... 3.5 M KCl
Reference Element ............... Ag/AgCl
pH Temp Sensor ................... PT-1000 RTD or 3 K Balco
ORP Identifi cation ................. 10 K ID for Signet instruments
Wetted Materials
Wet-Tap body ....................... Glass or PAS (Poly Aryl Sulphone)
Wet-Tap Junctions ................ Porous PTFE
Sensing surface .................... Glass (pH), Platinum (ORP)
O-rings .................................. FKM
Temperatures
Operating Temperature ......... 0 °C to 85 °C (32 °F to 185 °F)
Storage Temperature ............ 0 °C to 85 °C (32 °F to 185 °F)
Maximum Temperature and Pressure rating
6.89 bar @ 0 °C to 65 °C (100 psi @ 32 °F to 149 °F)
4.00 bar @ 65 °C to 85 °C (58 psi @ 150 °F to 185 °F)
Standards & Approvals - 275X Series
CE
Manufactured under ISO 9001 and ISO 14001
China RoHS (Go to www.gfsignet.com for details)
Operating Temperature
276X Series .......................... 0 °C to 95 °C (32 °F to 203 °F)
277X Series .......................... 0 °C to 85 °C (32 °F to 185 °F)
Storage Temperature ............ > 0 °C (32 °F)
Max Operating Pressure ..... 6.89 bar (100 psi)
Standards & Approvals - 276X Series, 277X Series
CE
Manufactured under ISO 9001 and ISO 14001
China RoHS (Go to www.gfsignet.com for details)
Ryton® is a registered trademark of Chevron Phillips Chemical
bar
6.89
pH/ORP Electrodes
276X Series and 277X Series
psi
Pressure vs. Temperature
100
6
80
60
4
40
2
20
0 40 50 60 70
°C
32 122
°F
277X Series
0 °C to 85 °C @ 6.89 bar
(32 °F to 185 °F @ 100 psi)
10 20 30
276X Series ONLY
90 100 80
212 176 50 86
Signet 275X, 276X, 2777X Series pH and ORP Electrodes
3
Page 4
Electrode Care and Application
Lubricate O-rings with a non-petroleum based, viscous, lubricant (grease) compatible
with the system.
pH/ORP electrodes are similar to batteries; they age with time and usage. The following
information will help maximize electrode life.
Conditions to Avoid:
• High temperatures, strong acids or caustics will speed electrode aging.
• Coatings on the glass or junction surfaces (e.g., proteins) cause extended response time
and inaccurate measurement.
• Never store the electrode tip in deionized (DI) water. Use pH 4 buffer solution to keep the
glass wet when out of the process.
• Never expose electrode to temperatures below 0 °C (32 °F) or allow it to dehydrate. These
conditions may damage the electrode.
• Never scrape or sand the glass electrode surface.
• Treat glass electrode surfaces with care to prevent accidental breakage.
Submersible Installation Tips:
• Choose a location that keeps the electrode glass completely submerged at all times.
• Mount electrodes in a location with ample clearance for removal.
• Place the electrode tip in pH 4 buffer during system maintenance or storage to avoid
dehydration.
• Mount the electrode near tank outlets, away from reagent addition areas.
In-Line Installation Tips:
• pH and ORP electrodes respond best in moving fl uids.
• Differential (2764 series) electrodes must by mounted at a downward angle (> 15° from
horizontal).
• 2774 and 2775 electrodes can be mounted at any angle.
pH Electrode Calibration
All pH electrodes are designed to provide linear output during their lifespan. The following
sections defi ne proper electrode operation.
Offset (STD)
Electrode offsets occur due to:
• Clogged reference junction
• Aged or contaminated reference electrochemical cell.
Check offsets in a pH 7 buffer @ 25 °C. The theoretical output is 0 mV.
Any deviation from 0 mV is the pH electrode offset.
pH electrode offset pH 7 buffer @ 25 °C. Theoretical: 7.0 pH (0.0 mV)
New electrode: pH 7 ± 0.25 pH (±15 mV)
Reliable: pH 7 ± 0.85 pH (± 50 mV)
Electrode offsets greater than 0.85 pH (50 mV) indicate the electrode requires cleaning or
replacement. See section 5: Maintenance and Cleaning.
Theoretical mV Values @ 25 °C
pH mV
2 +296 mV
3 +237 mV
4 +177 mV
5 +118 mV
6 +59 mV
7 0 mV
8 -59 mV
9 -118 mV
10 -177 mV
11 -237 mV
12 -296 mV
4
Signet 275X, 276X, 2777X Series pH and ORP Electrodes
Page 5
pH Electrode Calibration continued
Electrode slope is the ratio of mV per pH unit. At 25 °C the theoretical slope is 59.16 mV per pH. Temperature has an appreciable affect
on electrode slope. Reliable instrumentation includes temperature compensation. The graph below illustrates potential pH error when a
temperature compensated instrument is not used.
°C
2 3 4 5 6 7 8 9 10 11 12
15 0.15 0.12 0.09 0.06 0.03 0 0.03 0.06 0.09 0.12 0.15
2500000000000
35 0.15 0.12 0.09 0.06 0.03 0 0.03 0.06 0.09 0.12 0.15
45 0.30 0.24 0.18 0.12 0.06 0 0.06 0.12 0.18 0.24 0.30
55 0.45 0.36 0.27 0.18 0.09 0 0.09 0.18 0.27 0.36 0.45
pH Error
Recommendations:
• Calibrate temperature before calibrating the offset and slope.
• The mV offset will track across the entire pH range.
The slope is usually not affected by offset changes.
(e.g., pH 7 = +10 mV, pH 4 = +187 mV); slope = 59 mV
Slope = (pH 4 mV value - pH 7 mV value) ÷ Span between pH 7 and pH 4
Slope = (187 - 10) ÷ 3 = 59 mV
• Coatings on the glass may affect sensor slopes. See Maintenance and Cleaning.
• A constant output near 0 mV in all buffer solutions indicates a shorted electrode that must be replaced.
Response Time/Stability
Response time and stability are affected by the condition of the pH glass measuring surface (for an ORP electrode, the platinum surface),
the reference junction and the reference solution. Electrodes may sometimes be restored to acceptable levels by cleaning the measuring
surface and reference junction.
Electrode mV values should remain stable ± 3 mV. Conditions that may cause fl uctuations are:
• Electrode coating
• Clogged reference junction
• Ground fault: If proper operation is observed in the beaker, but readings are unstable in the application, a ground fault may exist.
• Using instrumentation with isolated inputs and outputs may restore stable operation.
• Solution grounding may also restore stable operation.
ORP Electrode Calibration
ORP electrodes are designed to ensure linearity during their lifespan. The following sections defi ne proper electrode operation.
Offset (STD)
• Electrode offsets are usually caused by clogged reference junctions or by an aged or contaminated reference solution/wire.
• Offsets should be checked in pH 7 buffer saturated with quinhydrone @ 25 °C. The theoretical output is +86 mV.
Any deviation from +86 mV is the ORP electrode offset (e.g., +90 mV).
• Quinhydrone is the oxidizer measured by the ORP electrode and is required for calibration. To measure ORP electrode offset,
saturate 50 mL of pH 4 and pH 7 buffers with grams of quinhydrone:
4 pH w/Quinhydrone 7 pH w/Quinhydrone
Temp: 20 °C 25 °C 30 °C 20 °C 25 °C 30 °C
ORP: 268 mV 263 mV 258 mV 92 mV 86 mV 79 mV
A new ORP electrode measures these values ± 15 mV. The electrode continues to be functional until the offset from
these values exceeds 50 mV. Electrodes with offset greater than 50 mV should be cleaned and replaced if necessary.
Slope (SLP)
ORP slope errors are generally caused by contamination of the platinum electrode surface. Cleaning the electrode surface will usually
restore proper values, response time, and stability. See section 5: Maintenance and Cleaning.
Many systems require both pH and ORP calibration. To conserve calibration reference solutions, use pH 7 and 4 buffers for pH
calibration fi rst. ORP calibration can be performed with the same buffers by adding quinhydrone.
Signet 275X, 276X, 2777X Series pH and ORP Electrodes
5
Page 6
Maintenance and Cleaning
Maintenance
Variables can affect long-term pH or ORP electrode life. For
this reason, a maintenance log is recommended for trend
analysis. When storing boxed sensors, lay the sensor fl at
to maximize hydration of the glass surface. Keep the glass
surface wet at all times. Soak the sensor tip in pH 4.0 buffer
during system maintenance intervals. In-line applications
should be plumbed with a depression (trap) so liquid is
maintained around the sensor tip. If the sensor dehydrates,
soak the sensor tip in pH 4 buffer for 24 to 48 hours, then
visually inspect the electrode for surface cracks, swelling,
or discoloration. Severely dehydrated electrodes cannot be
restored to normal operation.
Cleaning
Cleaning techniques vary depending on the type of coating
present on the glass electrode surface or reference junction.
• Soak electrodes in pH 4 buffer or KCl solution after
cleaning.
• Soft coatings can be removed by vigorous stirring, or with
directed spray of an applicable detergent or solvent onto
the glass surface. Chlorine bleach or mild detergent can
be used to remove soft coatings. Always rinse electrode
tip in clean water after cleaning.
• Hard coatings can be chemically removed. Use the
least harsh chemical which will remove the contaminant
within two (2) minutes without attacking the materials of
construction. e.g. calcium carbonate may be removed with
a 5% HCl (muriatic acid) solution.
• Oily or organic coatings can be removed with detergents
or an appropriate solvent that does not attack the materials
of construction; e.g. isopropyl alcohol may be used but
acetone must be avoided to prevent damage to the CPVC
sensor body.
• ORP platinum electrode surfaces can be gently wiped
with a wet paper towel. More stubborn coatings can be
removed by gently sanding with 600 grit wet and dry
silicone or carbide sandpaper, jewelers rouge, crocus
cloth, or very fi ne steel wool.
276X Series Differential Electrodes
Differential electrodes have a replaceable salt bridge and the
electrolyte chamber can be refi lled. The electrolyte chamber should
be full. If any fl uid is audible when shaken, the chamber should be
refi lled. Refi ll the electrolyte chamber when the electrode offset
exceeds 50 mV. Replace the salt bridge when performance becomes
sluggish or if the output is erratic or inaccurate.
Replacing the Salt Bridge
Parts Required: Salt Bridge (order number 3864-0001) and
Differential Reference Solution
(order number 3864-0002)
Tools Required: Small pliers
Procedure:
1. Remove sensor from mounting.
2. Hold upside down and unscrew salt bridge using a pair of small
pliers. Be careful not to damage the glass bulb!
3. Drain the depleted reference solution and dispose of properly.
4. Fill reference chamber with fresh reference solution (approx. 30 ml).
5. Replace salt bridge and screw fi nger tight. Solution will drip out
while screwing in salt bridge.
Use pliers to turn approximately ¼ turn past fi nger-tight.
6. Perform calibration (standard and slope) before returning the
system to service.
NOTE:
The refi llable electrolyte chamber in 276X series
differential electrodes may leak during storage
and shipping. Check the fl uid and refi ll before
installation if necessary.
6
Signet 275X, 276X, 2777X Series pH and ORP Electrodes
WARNING!
Wear appropriate eye, face, hand, body, and
respiratory protection when using chemicals or
solvents.
Page 7
Ordering Information
Mfr. Part No. Code Description
Signet 275X Series Wet-Tap DryLoc pH and ORP Electrodes
pH Electrode
3-2756-WT 159 000 834 Bulb pH electrode, glass body, DryLoc connector, use with the 3719 Wet-Tap Assembly only,
PT1000 RTD for connection to the 8900, 9900 and 9950 instruments when used with the 2750
sensor electronics
3-2756-WT-1 159 001 383 Bulb pH electrode, glass body, DryLoc connector, use with the 3719 Wet-Tap Assembly only,
3 K, for connection to 8750 instrument when used with the 2760 preamplifi er
3-2756-WTP 159 001 390 Bulb pH electrode, plastic body, DryLoc connector, use with the 3719 Wet-Tap Assembly only,
PT1000 RTD for connection to the 8900, 9900 and 9950 instruments when used with the 2750
sensor electronics
3-2756-WTP-1 159 001 384 Bulb pH electrode, plastic body, DryLoc connector, use with the 3719 Wet-Tap Assembly only,
3 K, for connection to 8750 instrument when used with the 2760 preamplifi er
ORP Electrode
3-2757-WT 159 000 835 ORP electrode, glass body, DryLoc connector, use with the 3719 Wet-Tap Assembly only, to use
with 2750 sensor electronics or 2760 preamplifi er
3-2757-WTP 159 001 391 ORP electrode, plastic body, DryLoc connector, use with the 3719 Wet-Tap Assembly only, to use
with 2750 sensor electronics or 2760 preamplifi er
Signet 276X Series Differential DryLoc pH and ORP Electrodes
pH Electrode
3-2764-1 159 000 943 Flat surface pH differential electrode, DryLoc connector, 3 K for connection to 8750 instrument
when used with the 2760 preamplifi er
3-2764-2 159 000 944 Flat surface pH differential electrode, DryLoc connector, PT1000 RTD for connection to 8900, 9900
and 9950 instruments when used with the 2750 sensor electronics
3-2764-3 159 000 945 Flat surface pH differential electrode, DryLoc connector, 300 for connection to other instruments
when used with the 2760 preamplifi er
3-2766-1 159 000 949 Bulb pH differential electrode with bulb protection, DryLoc connector, 3 K for connection to 8750
instrument when used with the 2760 preamplifi er
3-2766-2 159 000 950 Bulb pH differential electrode with bulb protection, DryLoc connector, PT1000 RTD for connection to
8900, 9900 and 9950 instruments when used with the 2750 sensor electronics
3-2766-3 159 000 951 Bulb pH differential electrode with bulb protection, DryLoc connector, 300 for connection to other
instruments when used with the 2760 preamplifi er
ORP Electrode
3-2765-1 159 000 946 Flat surface ORP differential electrode, DryLoc connector, 10 K ID resistor for connection to 8750
when used with the 2760 preamplifi er or connection to 8900, 9900 or 9950 when used with the 2750
sensor electronics
3-2765-2 159 000 947 Flat surface ORP differential electrode, DryLoc connector, PT1000 RTD for connection to other
instruments using the 2760 preamplifi er
3-2765-3 159 000 948 Flat surface ORP differential electrode, DryLoc connector, 300 for connection to other instruments
using the 2760 preamplifi er
3-2767-1 159 000 952 Bulb ORP differential electrode with bulb protection, DryLoc connector, 10 K ID resistor for
connection to 8750 when used with the 2760 preamplifi er or connection to 8900, 9900 or 9950 when
used with the 2750 sensor electronics
3-2767-2 159 000 953 Bulb ORP differential electrode with bulb protection, DryLoc connector, PT1000 RTD for connection
to other instruments using the 2760 preamplifi er
3-2767-3 159 000 954 Bulb ORP differential electrode with bulb protection, DryLoc connector, 300 for connection to other
instruments using the 2760 preamplifi er
Signet 277X Series Threaded DryLoc pH and ORP Electrodes
pH Electrode
3-2774 159 000 955 Flat surface pH electrode, DryLoc connector, 3 K RTD for connection to 8750 instrument when used
with the 2760 preamplifi er.
3-2774-1 159 000 956 Flat surface pH electrode, DryLoc connector, PT1000 RTD for connection to 8900, 9900 and 9950
instruments when used with the 2750 sensor electronics
3-2776 159 000 959 Bulb pH electrode with bulb protection, DryLoc connector, 3 K RTD for connection to 8750 instrument
when used with the 2760 preamplifi er
3-2776-1 159 000 960 Bulb pH electrode with bulb protection, DryLoc connector, PT1000 RTD for connection to 8900, 9900
and 9950 instruments when used with the 2750 sensor electronics
Signet 275X, 276X, 2777X Series pH and ORP Electrodes
7
Page 8
Ordering Information
Mfr. Part No. Code Description
Signet 277X Series Threaded DryLoc pH and ORP Electrodes
ORP Electrodes
3-2775 159 000 957 Flat surface ORP electrode, DryLoc connector, 10 K ID resistor for connection to the 8750
3-2775-1 159 000 958 Flat surface ORP electrode, DryLoc connector, No T.C. for use with other suppliers instruments
3-2777 159 000 961 Bulb ORP electrode with bulb protection, DryLoc connector, 10 K ID resistor for connection to the
3-2777-1 159 000 962 Bulb ORP electrode with bulb protection, DryLoc connector, No T.C. for use with other suppliers
Special Order Options - Please consult the factory
For pH and ORP Electrodes, Cable Option -HT-C can only be used with the 3-2722 BNC Adapter to connect to 2750 sensor electronics
or 2760 preamplifi er.
Electrode
3-2774-HT
3-2774-HF Special Order Flat glass pH electrode for hydrofl uoric acid applications <2%, DryLoc connector, in-line sensor, NPT
3-2775-HT
3-2775-AU Special Order Flat surface ORP electrode, gold electrode, DryLoc connector, in-line sensor, NPT, in-line sensor
3-2776-HT
3-2776-HF
3-2777-HT
3-2777-AU Special Order Bulb ORP electrode with protection, gold electrode, DryLoc connector, in-line sensor, NPT
Cable Option
-C
-ISO Special Order In-line sensor, ISO
Accessories and Replacement Parts for all pH
Mfr. Part No. Code Description
Calibration
3-2759 159 000 762 pH/ORP System Tester
3-2759.391 159 000 764 Adapter Cable for use w/2750, 2760
3-0700.390 198 864 403 pH Buffer Kit (includes 4.0, 7.0, and 10.0 buffer powder)
3-2700.395 159 001 605 Calibration Kit: includes 3 PP cups, cups stand, 1 pint pH 4.01, 1 pint pH 7.00
3822-7115 157 001 606 20 g bottle Quinhydrone for ORP calibration (must use pH 4.01 and/or pH 7.00 buffer solutions)
3822-7004 159 001 581 pH 4 buffer solution, 1 pint (473 ml) bottle
3822-7007 159 001 582 pH 7 buffer solution, 1 pint (473 ml) bottle
3822-7010 159 001 583 pH 10 buffer solution, 1 pint (473 ml) bottle
Accessories and Replacement Parts for 275X
1224-0205 159 000 836 O-ring, EPR (EPDM)
Accessories and Replacement Parts for 276X
3864-0001 159 001 007 Replacement salt bridge (2764)
3864-0002 159 001 008 Electrolyte solution, 500 ml
2120-0015 159 001 009 CPVC adapter: 1½ in. to 1 in.
2122-0015 159 001 010 PVDF adapter: 1½ in. to 1 in.
Special Order
Special Order
Special Order
Special Order
Special Order
Special Order
when used with the 2760 preamplifi er or the 8900, 9900 or 9950 when used with the 2750
sensor electronics
when used with the 2760 preamplifi er
8750 when used with the 2760 preamplifi er or the 8900 when used with the 2750 sensor electronics
instruments when used with the 2760 preamplifi er
Flat glass pH electrode, high temperature (110 °C, 230 °F), DryLoc connector, ¾" NPT, 3K TC,
in-line install only
Flat surface ORP electrode, high temperature (110 °C, 230 °F), DryLoc connector, ¾" NPT, 3K TC,
in-line install only
Bulb glass pH electrode with protection, high temperature (110 °C, 230 °F), DryLoc connector,
¾" NPT, 3K TC, in-line install only
Bulb glass pH electrode with protection, hydrofl uoric acid applications <2%, DryLoc connector,
in-line sensor, NPT
Bulb ORP electrode with protection, high temperature (110 °C, 230 °F), DryLoc connector, ¾" NPT,
3K TC, in-line install only
Cable end for high temperature submersible applications only
Georg Fischer Signet, LLC, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): (800) 854-4090
For the most up-to-date information, please refer to our website at www.gfsignet.com
3-2764.090 Rev F 06/17 English © Georg Fischer Signet LLC 2017
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