United Security Products' 220-SP is specially designed for installation in metal doors, this sensor unit eliminates problems with sensors designed for doors made of other materials. This unit is comprised of a wired, closed circuit switch and a magnet. This simple contact requires no glue or epoxy to install.
- 1" steel door contact
- 1.5" gap
- Concealed contact 1"x1.2"
- Rhodium metal contacts
- Rare earth magnets
- 24'" wire lead, 22awg
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