• Protocontrol Instruments (India) Private Limited

Electronic Speed Monitor

Zero Speed Switch Series: ESM is designed for indication and monitoring of rotational speed of the drive used on machines like crushers, conveyors, centrifuges, mixers, and agitators. The speed monitor which uses non-contact sensor like Inductive, Capacitive, Magnetic or Optical proximity switch to sense the speed and actuates a relay at preset speed. Using contacts of this relay desired control action such as Zero Speed protection/Under speed protection/over speed protection/under and over speed protection can be achieved. The model with digital display facility normally indicates actual speed of the equipment. Speed monitor displays set speed when push button is pressed. Hence accurate speed setting is possible.
The O/P is in the form of 2C/O relay contacts. Speed range is from 1 to 6000 RPM using Inductive Proximity Switch as a sensor and 500-5000 RPM using Magnetic or Optical sensor can be covered in six ranges. The enclosure for monitoring unit is panel-mounting type IP 30. A special sturdy cast Al enclosure suitable to IP 65 Grade can be provided when the unit is required to be field mounted. Supply voltage to the control unit is 240 V AC, or as per requirement. Versions substitute to imported one are also available.