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Walchem Sensors

WEL pH and ORP Electrodes

Walchem’s WEL Series electrodes are cost-effective differential pH and ORP electrodes for industrial applications.

Disinfection Sensors

Walchem’s amperometric disinfection sensors offer a cost effective and reliable solution to your disinfection control requirements.

Copper/Nickel Sensors

Walchem’s copper and nickel sensors are optoelectronic devices that are used in conjunction with Walchem’s on-line analyzers in a variety of applications including electroless copper or nickel baths, microetch baths and a number of other chemistries that contain more than 0.10 grams/liter (g/L) of copper or nickel ions.


If your water treatment chemical supplier can provide inhibitor with PTSA or Fluorescein fluorescent dye in the formulation, the Little Dipper 2 makes it easy for our WebMaster to measure and control the Little Dipper 2 concentration!

Contacting Conductivity Sensors

Contacting conductivity sensors measure conductivity of a solution via electrodes.