The PD687 can be installed just about anywhere in North America except Group A locations: indoors, outdoors, hot, cold, safe or hazardous area. The PD687-EX is FM Approved and CSA Certified as explosion-proof, will operate from –40 to 80°C, and adds only 1V to the loop. Its big 1 inch high display means it can be read from considerable distance. Calibration is a quick two-step process involving the adjustment of only two non-interacting potentiometers.
