Catalog > Consumer Electronics > Kits > Kits (By Function) > Alarms / Detectors / Security Catalog > Consumer Electronics > Kits > DIY Kits Crystal Locked Ultrasonic Movement Detector 1 Crystal Locked Ultrasonic Movement Detector 1 KIT20 ULTRASONIC MOVEMENT DETECTOR Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview Matched 40 kHz transmitter/receiver pair of transducers detects movement at over 7 metres. Separate PCB for mounting the active units. Latch/reset PCB-mounted switch on board. Sensitivity control. 9V battery operation. Transmitter is crystal- locked at 40kHz for maximum efficiency Additional Information Group Alarms / Detectors / Security Model K20 Downloads Datasheet PDF File 90.85 KB