GF Signet 2818-2823 Electrodes

Original price was: 635 $.Current price is: 499 $.

The Signet 2818-2823 Conductivity/Resistivity Electrodes are versatile and accurate sensors designed for a broad dynamic range. With a controlled surface finish and a platinum RTD for optimal temperature sensing, these electrodes provide precise measurements without electrode platinization. Available in various materials, these electrodes offer reversible threads or sanitary flanges for maximum installation versatility.

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Product details

The Signet 2818-2823 Conductivity/Resistivity Electrodes are the perfect choice for accurate and versatile sensing across a broad dynamic range. With a controlled surface finish, these electrodes provide accuracy and repeatability that is unmatched in the industry. The standard electrode is constructed of 316 SS, but other materials are available to provide maximum chemical compatibility.

The reversible threads or sanitary flanges available on these electrodes make them incredibly versatile and easy to install. The sanitary flange versions are available in stainless steel and titanium with a surface quality finish of less than RA 25. Additionally, these versions come with an optional NIST Traceability Certificate to meet USP requirements.

One of the unique features of the Signet 2818-2823 Conductivity/Resistivity Electrodes is their ability to achieve a three-decade measurement range without the need for troublesome electrode platinization. This is made possible by Signet’s patented measuring circuitry. The platinum RTD (Pt1000) located within the electrode allows for optimal temperature sensing, making these electrodes incredibly accurate and reliable.


Operating Range 3-2818, 3-2819 0.055 to 100 µS 18.2 MΩ to 10 KΩ 0.02 to 50 ppm
3-2820 1 to 1000 µS 1 MΩ to 1 KΩ 0.5 to 500 ppm
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) Standard 4.6 m (15 ft)
Maximum 30 m (100 ft) all sensors when used with 9900 or 9950 and Direct Conductivity/
Resistivity Module. 2818, 2819 maximum 4.6 m (15 ft) when used with 2850


  • Hastelloy-C
  • Monel
  • Titanium
  • In-line or submersible mounting
  • NIST traceable certified cells ±1% meet USP requirements
  • Standard process connections ¾" NPT Polypro
  • Tri-clamp 1 -1 1/2", 2"
  • ¾ in. NPT SS on 10 and 20 cell
  • Optional 1/2" NPT 316 SS
  • 316 SS or Titanium standard electrode
  • Alternative electrode materials available

Typical applications

  • Salinity
  • Boiler condensate
  • Semiconductor Water Production
  • Rinse Water Monitoring and Control
  • Chemical Concentrations
  • Cleaner and Degreaser Concentrations
  • TDS (total dissolved solids)
  • USP Purified Water
  • WFI Water Production
  • Ultra Pure Water
  • Pure Water Treatment: Reverse Osmosis, Deionization, Distillation

Downloadable PDF

GF Signet 2818-2823 Electrodes (English)