An ultrasonic sensor detects the presence of personnel, and triggers count and background cycles. Detector-specific alarm lights localize contamination. This provides for maximum throughput by eliminating the need to coordinate the count cycle with the user's portal entry, and optimizes sensitivity by minimizing the effects of tail-gating. Count time, priority alarm enable, recount enable, and early exit alarm are all configurable. Setup and optimization is via display panel keypad and LED display, or optional handheld control.
Optimization is semiautomatic just place the source when prompted.
System power and access to all calibration parameters are keylock protected.