• MRK Engineers Private Limited

Electronic Speed Switch

Electronic Speed Switch is ideally suited to monitor any repetitive motion, whether rotational or transitional. It is best suited for the speed monitoring of critical elements of any material handling system, such as belt/screw conveyors, elevators, crushers, drag chains, rotary feeders, etc. It senses the underspeed/overspeed conditions in the system by noncontact method and provides output contacts for protection control and interlock purposes. Applications include detection of jamming in feeders, sequential interlocking of conveyor, detection of blade breakage in reclaimer chain, motion detection and fan speed monitoring . Models having indication facility or having 4-20 mA output find extensive use in central control room instrumentation. Modle with multiple setting facility find use in speed dependent switching of control gear. The speed switches comprise a sensor probe and a monitor unit. The sensor probe is non-contact type inductive sensor which picks up speed information from the system. The monitor unit accepts this information, evaluates it and provides necessary output. The epoxy potted probe is dust and water-tight to IP-67, and monitor, in sheet steel or cast aluminium, epoxy painted housing, is dust-tight to IP-55. The advantages include non-contact sensing, extreme low speed detection possible, built-in initial bypass facility and matching speed indication is possible.