Envytech systems offers manufactures 60 series fixed fixed insetion insertion differential differential ph or orp sensorsensor. The salient featuresfeatures of the orp sensor include: accurate built-in pre amplifier; transmits up to 3000 ft [900m]; replaceable salt bridge; 15 ft [5 m] cable; flow through or submersible; precise differential measurement; eliminates checks ground loop interference; built-in pre amplifier; transmits up to 3000 ft [900m]; replaceable salt bridge; 15 ft [5 m] cable; flow through or submersible; temperature sensing device in all sensors; and 30-month warranty. Application of 60 series fixed insertion differential ph or orp sensorapplication: p - ph, r - orp; electronics - 60c - standard 5 wire sensor, 65c - two wire transmitter, 4-20 ma output built-in; body type - 8 - 1-1/2" npt threaded ends, glilcp replacement probe, 4 - gli 605ipo replacement [sensor only], s - fixed insertion with sanitary 2-1/2" tri-clover fitting; enhanced performance options [add only if required] - a - antimony electrode, used in hydrofluoric acid [ph sensors only], h - hardened glass electrode, f - flat faced glass electrode [s body type only], g - gold electrodes for orp sensors only [platinum is standard]; and sensor cable length - xxx - standard cable length is 15 ft [5 m] specify other if needed.