5 Sets Flush Mounted 3/4" Door Magnetic Contacts Alarm Switch Sensor NC Type (Black)

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About This 3/4" standard mounting diameter with self-locking clip White/black color for choosing, suitable for dark or light color doors/windows Over 1" long operation distance, su itable for metal doors NC type: when door is closed, switch is closed loop, when door is open, switch is open loop High quality reed switch&magnet, over 50K times open/close circulation Overview Operation Mode : automatic Contact Type : Normally Closed Connector Type : Molex Brand : DSYBJR Switch Type : Nc Terminal : Quick-connect Material : Plastic Item dimensions L x W x H : 0.75 x 0.75 x 1 inches Circuit Type : Normally Closed Mounting Type : Wall Mount Show more