Alarm Switch Screw Terminals 3/4" Gap - White
By Seco-larm (SM-200Q/W)
MCM Part #82-13866
The most basic sensors of any alarm system is a door and window Surface Mount Magnetic Contact Switch. This type of contact switch is for normally closed circuits; this means that the when the magnets are lined up, the switch is closed. This type of setup is ideal for monitoring doors, windows, and sliding doors.