uxcell N.O. Recessed Wired Security Window Door Contact Sensor Alarm Magnetic Reed Switch White RC-33 4pcs

Price: $17.59
(as of Mar 06, 2023 04:29:15 UTC – Details)

[Dimension] – Cable Length: 30cm/11.8″; Total Size: 16.7mm x 10.7mm/0.66″ x 0.42″ (L*D)
[Widely Usedl] – This Recessed Door Contact Sensor works with any access control or burglar alarm system available
[Normally Open] – NO means Normally Open: when the magnet separates, the circuit is conductive( light on ); When the magnet together, the circuit is not conductive ( light off ).
[Note] – the Magnetic Door Switch must be installed according to the sensing distance. It can only provide a switch signal to the transmitter. It cannot directly load the power, nor directly connect the lamp!