Ultrasonic Sensors For Car Alarm USSblk

Ultrasonic Sensors are alternative for microwave radar sensor, for use with your car alarm. An Ultrasonic sound sensor employs the same theory as the microwave sensor but by the use ofsound instead of microwaves. The ultrasonic sound sensor waits for an ultrasonic echo reflected off a body entering within its range. The ultrasonic sensor kits Works by monitoring air-pressure levels. The act of opening a door or forcing a window creates a change in pressure which triggers the alarm..
Two sensors are provided and fitted on each side of the front of the vehicle and pointed towards the rear.

• Simply fit a sensor to each side of the windscreen using the spring clips supplied.
• Fully Adjustable Sensitivity
• Negative Trigger Output
• Compatible with any alarm with a negative trigger input
• Quality Products at fantastic prices!

 Specification: 

• Frequency: 40Khz Crystal Locked
• Standby current: 6mA +/-2mA
• Max. trigger output current: 100mA
• Input voltage: 9v Min., 15v Max.

 Package Contents:

• Main Unit
• 2x Ultrasonic Detectors (colour: Black)
• Cable to connect to alarm
• Instructions