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 :
Honeywell Ademco 5890PI pet-friendly motion sensor, works w/ ADT Blue security | eBay
1 Piece ADT Model MC-760/ADT SCN 487434 Motion Sensor New Old Stock | eBay