Amazon.com: Sensor Riser Compatible with ADT - DIY Contact Sensor Spacer for ADT Wireless Home Security Systems, Gate Window Door Motion Sensors Alarm System and Home Security Accessories, Sensor Not Included :
How can I remove this former ADT motion sensor (more in comments) : r/homeautomation
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Compact, flexible wireless and wired security detectors
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Moved into a new house and the previous owners had ADT installed. I'm assuming I would have to call them to be able to use this sensor? : r/homeautomation
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How to Change the Battery in Your ADT Wireless Motion Detector for your Safewatch Pro 3000 or TS - YouTube