The EMX USVD-4X is an ultrasonic vehicle detector designed for drive thru vehicle presence detection across common operations such as fast food, banking, pharmacies, car washes, and parking. Instead of installing an in ground inductive loop, the USVD-4X is mounted above ground on a post or an order box and aimed at the location where a vehicle will pass to initiate a transaction. This approach can reduce installation cost and simplify deployment. The detector uses Triangular Planar Array TPA technology. Its detection head contains four ultrasonic transducers that connect to an internal microprocessor based control board, which scans the expected vehicle location and activates output upon detection. Power is 12-24VAC or VDC, and output is provided through a Form C set of relay contacts indicating vehicle presence for integration with your drive thru or access system.