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2839-2842 NPT Conductivity-Resistivity Electrodes

The 2839-2842 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. 316SS electrode surface finishes are controlled in a precision bead blasting operation to ensure measurement accuracy and repeatability. The PEEK™ insulator and process connections are injection over-molded to minimize variance between electrodes.

Double threaded connections in either 3/4 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.

Fields of Application:

  • Water Treatment & Water Quality Monitoring
  • Reverse Osmosis
  • Deionisation
  • Cooling Tower and Boiler Protection
  • Distillation
  • Desalination
  • Demineraliser
  • Semiconductor
  • Aquatic Animal Life Support Systems



  • Controlled surface finish ensures accuracy and repeatability
  • 316SS electrodes with injection molded PEEK™ process connections and insulators
  • Compact electrode length for easy in-line installation
  • Suitable for operation up to 131 °C (268 °F)
  • 3/4 in. NPT or ISO 7/1 - R 3/4 process connections
  • Double-threaded connection for in-line or submersible mount
  • Triple orifice flow-through design reduces clogging and bubble entrapment
  • Cell constants may be traceable to NIST and certified to within ±1% of value
  • Integral Mounting Kit and junction box acccessories



  • RoHS compliant