The PD686 can be installed just about anywhere in North America: indoors, outdoors, hot, cold, safe or hazardous area. It has been approved by FM and CSA as instrinsically safe and non-incendive, will operate from –40 to 85°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
