Ultrasonic Movement Detector 1 (Kit)
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Description: Matched 40 kHz transmitter/receiver pair of transducers detects movement at over 23 feet. Separate PCB for mounting the active units. Latch/reset PCB-mounted switch on board.
9V battery operation
Transmitter is crystal- locked at 40kHz for maximum efficiency
Main PC board size 2.8in x 1.9in (71mm x 50mm)
Small PC board size 2.8in x .5in (71mm x 11mm)