$ 242
FlexGuard Glassbreak Detector Honeywell Security FG-1625T
$ 80
Mengshen Anti-Theft Door Window Alarm Wireless Alarm
$ 61
uxcell N.C. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch Brown RC-36 2pcs
$ 315
Cop Security 15-946 Indoor/Outdoor Photoelectric Dual Beam Sensor Up to 550ft(indoor)/180ft(outdoor) (Black)
$ 608
Federal Signal Litestak Base, 120VAC
$ 109
uxcell N.C. Recessed Wired Window Garage Contact Sensor Alarm Magnetic Reed Switch White HC-34A 10pcs
POR
5 Sets NO Door Window Sensor Magnetic Reed Switch RC 33 Recessed Security Alarm Contacts Normal Open White
POR
RSR Mini Touch Sensor Kit Compatible with Arduino IO Expansion Shield (SEN0104)
$ 513
Banner QS18VP6AF100Q5 World Bean Adjustable Field Sensor, Visible Red LED, 4-pin European Style QD, PNP Output Type, 100mm Range, 4 Pins
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