This magnetic reed door switch will detect any unauthorized entry or intrusion. Usually installed on doors and windows, the sensors monitor their opening and closing. Several magnetic reed switches may be wired in series or parallel (depending on if you want the alarm to be when the door is opened or closed).
1 x Magnetic Reed Door Switch Kit
Dimensions: 2.5" x 0.75" x 0.5" (part with screw terminals)
Dimensions: 2.5" x 0.75" x 0.625" (part with magnet)
Reed Contact is CLOSED when the door is closed and OPEN when the door is open
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