State–of–the–Art microprocessor based and easy to use. Users say “It just seems to do what you expect.” Automatically recognizes pH buffers for easy accurate calibration and identifies pH Electrode Status. Two unique 4–20 mA outputs, independently   programmable   zero,  span   and 

direction, for acid and caustic feed (or pH and Temperature). Similarly, two programmable alarms and diagnostics are included. Optional PID control functions, even TWO pH electrode inputs are available on the Model 656! Housed in a moisture and corrosion resistant case. Reliable loop powered 2–wire 4 to 20 mA pH transmitters are also available in similar or explosion–proof housings.

PH & ORP Sensors

Large industrial design with built–in ruggedness and long life needed by industry. Heavy duty body protects cushion mounted electrodes for impact resistance, with sealed encapsulated leads to keep moisture out. Protected pH glass tip, large reference  junctions  surface  to   resist   plugging

and contamination–resistant reference construction ensures accuracy and long electrode life in tough applications such as effluent streams, pulp stock, mining slurries, high temperature or strong chemicals.