Georg Fischer 2734 Specifications

Signet 2734-2736 pH/ORP Electrodes

Compatible with Signet 8900/9900 Instruments

Features

• Patented reference design for exceptional
performance *

• Mounts in Signet standard fittings from
DN15 to DN100 (½ to 4 in.)

• ¾” NPT or ISO 7/1-R 3/4 threaded sensors for
use with reducing tees DN15 to DN100 (½ to 4 in.)

• Special design allows for installation at any
angle, even inverted or horizontal

Flat

Glass

The Signet 2734-2736 pH and ORP Electrodes features
a patented reference electrode design and uses the
unique foul-proof patented DryLoc® connector. The large
area PTFE reference junction, salt bridge and reference
electrode are constructed to increase the total reference
effectiveness, resist chemical attack, and ensure long
service life.

The DryLoc® connector with corrosion resistant gold
plated contacts readily connects the sensor to the
mating 2750 sensor electronics. The robust Ryton®
threaded sensor body and choice of flat, bulb pH, or flat
ORP sensing elements provide a broad range of chemical
compatibility for a wide variety of applications.
There is an optional pH sensing version available for
applications with HF. The HF version is for applications
where traces of hydrofluoric acid (2% or less) will attack
standard pH glass in levels of pH 6 and below.

The quick temperature response is available in a PT1000
temperature sensor and allows compatibility with the
Signet 8900 and 9900 instruments.

The 2734-2736 electrodes are ideal for a wide range of
harsh applications. The sensors incorporate ¾ inch
NPT or ISO 7/1-R 3/4 threads for installing into standard
pipe-tees. They can also be mounted directly into Signet
standard fittings, DN15 to DN100 (½ to 4 inch).

Protected

Bulb

• Ryton

• Patented DryLoc® connector with gold plated

• Quick temperature response

• Enhanced Reference and Bridge Gels to resist

• PTFE Reference Junction resists fouling and

®

(PPS) body and PTFE junction for broad

range of chemical compatibility

contacts

chemical poisoning and prolong the life of the
electrodes

chemical attack

Applications

• Water & Wastewater Treatment

• Neutralization Systems

• Effluent Monitoring

• Sanitization Systems

• Pool & Spa Control

• Aquatic Animal Life Support Systems

• Process Control

• Cooling Towers

*U.S. Patent Nos.: 6,666,701,
7,799,193 B2, 7,867,371 B2 and
8,211,282 B2

Specifications

General

Performance Efficiency

Operating Range pH 0 to 14 pH

ORP ±2000 mV
3-2734-HF, 3-2736-HF

Compatibility

2750 Sensor Electronics (for 8900, 9900, 4 to 20 mA)

Temperature Sensor

PT1000 Compatible with Signet 2750 pH/ORP Sensor electronics for

Process Connection

¾ in. NPT ISO 7/1-R ¾ Mounts into Signet fittings

Wetted Materials

pH Ryton
ORP Ryton

Max. Temperature/Pressure Rating

Operating Temperature Range
Operating Pressure Range

Recommended Storage Temperature

The electrode glass will shatter if shipped or stored at temperature below 0 °C (32 °F)
The performance life of the electrode will shorten if stored at temperatures above 50 °C (122 °F)

Mounting

In-line Mounting Use the sensor threads

Use a Signet standard fitting ½ to 4 in.
Sensor can be mounted at any angle

Submersible Mounting Use threads on model 2750

Requires ¾ inch NPT or ISO 7/1-R ¾ male threaded liquid tight extension conduit.

Shipping Weight

0.25 kg 0.55 lb

Standards and Approvals

RoHS compliant, China RoHS
Manufactured under ISO 9001 for Quality, ISO 14001 for Environmental Management and

OHSAS 18001 for Occupational Health and Safety

>95% @ 25 °C (77 ° F)

Hydrofluoric acid resistant glass, pH 6 or below; trace HF <2%

connection to a PLC or to the Signet 8900 or 9900 instruments

®

(PPS), glass, PTFE, FPM

®

(PPS), glass, PTFE, FPM, Platinum

10 °C to 100 °C 50 °F to 212 °F
0 to 6.9 bar (0 to 100 psi) @ 10 °C to 65 °C (50 °F to 149 °F)
Linearity Derated 6.9 to 4.0 bar (100 to 58 psi) @ 65 °C to 100 °C

(149 °F to 212 °F)

0 °C to 50 °C 32 °F to 122 °F

See Temperature and Pressure graphs for more information

www.gfsignet.com