Model MSD Motion Control Sensors Monitor Rotary Speed

Model MSD-800 series motion sensing controls offer affordable and reliable protection of indoor and outdoor rotating equipment such as screw conveyors, belt conveyor pulleys, rotary feeders, and bucket elevators from costly damage by continuously monitoring rotary speed. The sensor alerts the operator of a change in speed by sending a signal to the control unit which can be used to sound an alarm and/or shutdown the equipment completely. 

The Model MSD is comprised of two different components: A control unit and a speed sensor. The unit has a simple setup menu that can be programmed to indicate 2 under-speed points or 2 over-speed points, or one of each. The control unit acts as a digital tachometer that constantly displays the actual rotary speed of the equipment being monitored. The control unit is installed remotely in a control panel where it's free from dust, dirt, and vibration and allows the operator to monitor equipment from one central location.

The Model MSD-1 speed sensor, which installs directly to the shaft of the rotating equipment to be monitored, is enclosed in cast aluminum housing that is designed to withstand harsh environments. The sensor detects motion by means of a precision metal disc with slots on its periphery generating electronic pulses as the disc rotates past an infrared light source. These pulses are transmitted to the MSD-800 control unit where the signal is analyzed and the relays are activated or deactivated at preset signal speeds. The sensor enclosure is weatherproof, dust-tight, and meets NEMA Type 3S, 4, and 4X classifications.