WEL pH/ORP Sensors
WDP and WPH Series Controllers are a perfect match with Walchem's WEL pH/ORP electrodes - offering an extremely reliable differential measurement technique immune to any possible ground loop problems. Together they provide a true NEMA 4X system with no BNC connectors exposed to wet or corrosive conditions. Walchem's pH/ORP controllers and sensors are engineered to give you the most reliable measurement and control available.

WDS pH/ORP Sensors
Walchem’s WDS Series Differential pH and ORP Sensors are designed for industrial applications to be long-lasting and reliable.The differential measurement technique uses two electrodes, one for the process measurement and the other for the reference measurement. Each electrode is measured differentially with respect to a third metal electrode. The reference electrode is constructed from pH glass and is embedded in pH 7 buffer within the sensor behind a porous, replaceable salt bridge.

Lakewood Instruments™

Model 352 pH Process Controllers
The Model 352 pH Controller is designed for pH control in process and wastewater systems. It can use several different styles of pH electrodes for different process applications.

Model 353 ORP Process Controllers
The Model 353 ORP Controller is designed for ORP control in process and wastewater systems.

Model 2175P Conductivity Cooling Tower Controllers
A large illuminated graphics screen, multiple inputs and very easy setup with easy field upgrade combine to give you the highest level of application flexibility. For use with process-type conductivity sensors.

Model 2330P ORP Controllers
Differential ORP Controller for differential ORP sensor input with diagnostics indicate fouled reference or open PT band. Available flowswitch lockout. Four user-selectable relay options (four additional with NRLY), and three security levels.

Model 2350P Microprocessor-Based pH Controllers
A large illuminated graphics screen, multiple inputs and very easy setup with easy field upgrade combine to give you the highest level of application flexibility. For use with process-type pH sensors.

Model 2412P Microprocessor-Based Conductivity and pH Controllers
A large illuminated graphics screen, multiple inputs and very easy setup with easy field upgrade combine to give you the highest level of application flexibility. For use with process-type pH and conductivity sensors

Model 2430P Microprocessor-Based Conductivity and ORP Controllers
A large illuminated graphics screen, multiple inputs and very easy setup with easy field upgrade combine to give you the highest level of application flexibility. For use with process-type conductivity sensors

Oakton: pH Meters