ACD Machine Control Company Pvt Ltd offers Field Failure Relays. Field failure relay, also known as field loss relay, protects the DC shunt wound motor or main circuit, under open field conditions, or in the absence of the field supply.
ACD Electronic Vibration Switches can be directly installed in place of mechanical vibration switches and offer immense advantages. The basic sensor is piezo electric accelerometer, which has no moving parts.
The Vibration Meter, Model D 83 & D 93, uses piezo electric transducer. Piezo electric transducer is the most sensitive of its kind available today. It has a built-in mechanical filter that eliminates all unwanted frequencies including audio pick-ups.