CS41 Sensors

For sample line installations such as boiler water where the pressure cannot be reduced the CS41 Two Electrode Conductivity Sensor provides a great option.

  • Broad range of cell constants 0.05 / 0.1 / 1.0 / 2.0
  • Ratings from 250PSIG @ 205oC to 500PSIG @ 100oC
  • 316 Stainless Electrodes, PEEK insulator
  • 3/4 inch Male NPT process connection
  • Optional Explosion-proof junction box
The CS41 Two Electrode Conductivity Sensor is specifically designed to handle the high pressure requirements found in boiler water measurement. It uses a rugged, explosionproof junction box with a high temp terminal strip for internal wiring.


CS41 Two Electrode Conductivity Sensor
CS41 with 0.10 Electrode



  • Broad range of cell constants 0.05/0.1/1.0/2.0
  • Ratings from 250PSIG @ 205oC to 500PSIG @ 100oC
  • 316 Stainless Electrodes, Peek Insulator
  • 3/4 inch Male NPT process connection
  • Optional Explosion-proof junction box

For sample line installations such as boiler water where the pressure cannot be reduced, the CS41 Two Electrode Conductivity Sensor provides a great option.

Wetted Material
  • Electrodes: 316 Stainless Steel
  • Insulator: PEEK
  • Seals: EPR (dual o-ring)
  • Mounting: 316 Stainless Steel

Temperature Compensation
  • PT100 RTD
  • PT1000 RTD
  • 8550 Ohm (Honeywell)

Pressure/Temperature Ratings

Sensor Design Max Pressure / Temperature
316 Stainless 400 PSIG @ (2758 kPa) @ 212°F (100°C)
250 PSIG @ (1724 kPa) @ 401°F (205°C)


Sensor Technology - How it works

2 Electrode Tech

Two electrode conductivity measurement is based on the ability to conduct a current between two electrodes. The concentration of ions in the liquid are directly proportional to the conductance of the liquid.

Pros Cons
  • Simple, time-proven electrode design
  • Industry standard cell constants determine measurement range
  • Works best for clean applications where electrodes do not get fouled
  • High accuracy and repeatability
  • Susceptible to coating and scale (no compensation)
  • Susceptible to corrosion
  • No diagnostics


Conductivity Chart