Georg Fischer 2839-1V, 2840-1V, 2841-1V, 2842-1V Specifications

Signet 2839-1V(D) to 2842-1V(D) PVDF
Conductivity Electrodes

Features

• ± 2% accuracy - Custom calibration
certificate provided

• Dual-threaded

• Compact electrode length for easy in-line
installation in small pipe sizes

• Triple orifice flow-through design

reduces clogging and bubble entrapment

• 316 SS electrodes with injection molded
PVDF process connections and insulators

• Meets USP requirements

2839-1V 2840-1V

2841-1V
2842-1V

The Signet 2839-1V(D) to 2842-1V(D) Conductivity/
Resistivity Electrodes are available in four cell
constants from 0.01 to 10.0 cm-1, and are suitable for
a wide variety of applications from high purity water
quality monitoring to weak acids and bases. 316 SS
electrode surface finishes are controlled in a precision
bead blasting operation to ensure measurement
accuracy and repeatability.

The PVDF insulator and process connections are
injection over-molded to minimize variance between
electrodes. Double threaded connections in either
¾ in. NPT or ISO 7/1-R 3/4 enable quick and easy
installation in submersible or in-line configurations.
Transmitter integral mounting kit and junction boxes
are available as accessories.

A Certificate of Calibration is included with all
28391-V(D) to 2842-1V(D) Conductivity/Resistivity
Electrodes. The electrodes are calibrated to meet
± 2% accuracy. Electrodes can be shipped back to
the GF Signet factory for recertification.

Applications

• Water Treatment & Water Quality Monitoring

• Reverse Osmosis

• Deionization

• Cooling Tower and Boiler Protection

• Distillation

• Desalination

• Demineralizer

• Semiconductor

• Aquatic Animal Life Support Systems

Specifications

General

Operating Range

2839 0.055 to 100 μS 0.02 to 50 ppm
2840 1 to 1,000 μS 0.5 to 500 ppm
2841 10 to 10,000 μS 5 to 5,000 ppm
2842 100 to 200,000 μS 50 to 100,000 ppm

Cell Constant Accuracy ± 2%. When the information provided on the certificate of calibration is entered into the

transmitter/controller. ± 5% when entered as a standard cell constant

Dual-Threaded
Process Connection

Cable Length
(use for the
2839, 40 ,41
and 42)

Temperature Element PT1000
Temp. Response, 

Temperature Accuracy ±0.5 °C ±0.9 °F

Wetted Materials

Internal O-ring (2841 and 2842) FPM
Insulator Material PVDF
Electrode Material 316 SS
Threaded Process Connection PVDF

Max. Temperature/Pressure Rating

Storage Temperature -20 °C to 131 °C -4 °F to 268 °F

Shipping Weight

2839 0.34 kg 0.74 lb
2840, 2841, 2842 0.30 kg 0.66 lb

Standards and Approvals

standard 4.6 m (15 ft)
maximum 30 m (100 ft) all sensors when used with the 9900

0.01 cells 4.6 m (15 ft) used with 8850, 8860, and 2850*

0.01 cell 5 sec.

0.10 cell 10 sec.

1.0 cell 20 sec.

10.0 cell 30 sec.

-1V versions: ¾ in. NPT

-1VD versions: ISO 7/1-R 3/4

131 °C @ 2.76 bar 268 °F @ 40 psi

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

and OHSAS 18001 for Occupational Health and Safety

18.2 MΩ to 10 KΩ
1 MΩ to 1 KΩ

* 2850 cable length 4.6 m (15 ft) maximum for all cells.

See Temperature and Pressure graphs for more information.

www.gfsignet.com