Comus vibration sensor non mercury comus au2401 6 the comus mini motion sensor incorporates a non mercury contact surface mount vibration switch when disturbed the sensor reacts by a fleeting change to the state of the switch contact the time taken to settle depends on the amount of energy absorbed by the device this range of high sensitivity motion sensors has been designed for use with both analogue and digital circuitry comus au2401 6 au2401 5 24v smd mini vibration sensor