Georg Fischer 2819-2823 Specifications

Signet 2818-2823 Conductivity/Resistivity Electrodes

2818

2819

in-line only

2820

2821

2822

2823

Reversible
threads for
in-line or
submersible
installation.

Sanitary

Sanitary
tri-clamp
flange version.

Signet 2818-2823 Conductivity/Resistivity Electrodes
are designed to provide versatile installation and
accurate sensing across a very broad dynamic range.
These electrodes are built with a controlled surface
finish to ensure accuracy and repeatability. The
standard electrode is constructed 316 SS or Titanium,
but there are other materials available for maximum
chemical compatibility.

Reversible threads or sanitary flanges allow for
maximum installation versatility. Sanitary flange
versions are available with surface quality finish of
less than RA 25 and with an optional NIST Traceability
Certificate to meet USP requirements. Coupled with
Signet patented measuring circuitry, a three decade
measurement range is achieved without the need for
troublesome electrode platinization. A platinum RTD
(PT1000) located within the electrode allows optimal
temperature sensing.

Features

• Standard process connections

- ¾ in. NPT Polypro

- ¾ in. NPT SS on 10 and 20 cell

- Tri-clamp 1 -1½ in., 2”

- Opt. ½ in. NPT 316 SS

• 316 SS or Titanium standard electrode

• Alternative electrode materials available

- Hastelloy-C

- Monel

- Titanium

• In-line or submersible mounting

• NIST traceable certified cells ±1% meet USP
requirements

Applications

• Pure Water Treatment

- Reverse Osmosis

- Deionization

- Distillation

• Boiler Condensate

• Semiconductor Water Production

• Rinse Water Monitoring and Control

• Chemical Concentrations

• Cleaner and Degreaser Concentrations

• TDS (Total Dissolved Solids)

• Salinity

• USP Purified Water

• WFI Water Production

• Ultra Pure Water

Specifications

Models 3-2818-1( 0.01 cm-1 Cell), 3-2819-1* (0.01 cm-1 Cell), 3-2820-1* (0.1 cm

* Certified versions available (add “C” suffix to part no.)

General

Operating Range 3-2818, 3-2819 0.055 to 100 μS

3-2820 1 to 1000 μS

3-2821 10 to 10,000 μS 5 to 5,000 ppm

Cell Constant Accuracy ±2% of reading (certified cells ±1%)

Temperature Compensation Device PT1000

Cable Length
(use for the 2818,
19, 20, 21, 22 and

23)

3-2818, 3-2819-1 sensors 7.6 m (25 ft) max. when used with 8850, 8860. No splicing of cable.

Call factory for special order sensor

standard 4.6 m (15 ft)

maximum 30 m (100 ft) all other sensors (except 2818 and 2819 max. 7.6 m (25 ft)

Wetted Materials

O-rings EPR (EPDM)

Insulator Material Carbon fiber reinforced PTFE

Electrodes 316L stainless steel (1.4408, DIN 17440) or Titanium

Max. Temperature/Pressure Rating

Standard Polypro Fitting

Optional 1/2: NPT 316 SS fitting (3-2820.392)

Sanitary Connection

6.9 bar @ 100 °C 100 psi @ 212 °F

13.8 bar@ 120 °C 200 psi @ 248 °F

6.9 bar@ 120 °C 100 psi @ 248 °F

Temperature Response, 

0.01 cell 7 sec.

0.1 cell 53 sec.

1.0 cell 21 sec.

Temperature Accuracy 0.3 °C

Shipping Weight

0.4 kg 0.8 lb

Standards and Approvals

RoHS compliant, China RoHS

Model 3-2822-1 (10.0 cm

-1

Cell)

General

Operating Range 100 to 200,000 μS 50 to 100,000 ppm

Cell Constant Accuracy ±2% of reading (certified cells ±1%)

Temperature Compensation Device PT1000

Cable Length standard 4.6 m 15 ft

maximum 30 m 100 ft

Wetted Materials

O-rings EPR (EPDM)

Body CPVC

Electrodes 316 stainless steel (1.4408, DIN 17440)

Process Connection Standard 316 SS fitting ¾ in. NPT threads

Optional 316 SS submersion
adapter fitting (3-2820.390)

Max. Temperature/Pressure Rating

6.9 bar @ 95 °C 100 psi @ 203 °F

Temp. Response,  5 seconds

Temp. Accuracy 0.3 °C

Shipping Weight

0.4 kg 0.8 lb

Standards and Approvals

RoHS compliant, China RoHS

-1

Cell), Models 3-2821-1* (1.0 cm

18.2 MΩ to 10 KΩ

1 MΩ to 1 KΩ

¾ in. NPT threads

-1

Cell)

0.02 to 50 ppm

0.5 to 500 ppm

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