pH and ORP Sensors for the Process Industries These probes are designed for rugged service in submersion or on-line applications. The reference cell features a Double Junction design for extended service life in harsh applications. The body, with integral pipe thread, is molded with chemical resistant Ryton (PPS) and the reference junction is porous Teflon or ceramic. Build-in temperature compensation are available. Optional sensor guard on the front of the sensor protects the sensor tip from impact. Sensor also available in ORP (Redox) Version. In-line and submersion application as well as built-in temperature compensation, three probes models available: In-line, Flat bulb and Extended insertion.