The Gladiator Acoustic Switch uses acoustic wave technology in a new sender/receiver form for blocked chute detection, point level detection and anti-collision for heavy machinery. An amplifier powers two AW transducers, and both units pulse and receive each other's acoustic echoes. When the path between the transducers is blocked, the units immediately detect the presence/absence change of the return signal and trigger a communications relay. The transducers are self cleaning and do not require contact with the product. The unit is designed for continuous operation in dusty, wet environments where other technologies fail.