Magnetic Contact Switches
Magnetic contact switch (door sensor)
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This sensor is essentially a reed switch, encased in an ABS plastic shell. Normally the reed is 'open' (no connection between the two wires). The other half is a magnet. When the magnet is less than 13mm (0.5") away, the reed switch closes. They're often used to detect when a door or drawer is open, which is why they have mounting tabs and screws. You can also pick up some double-sided foam tape from a hardware store to mount these, that works well without needing screws.
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BR-1011 :Recessed Mounted * 3/8" diameter Super Miniature Stubby switch* Press to fit* Standard 18" #22AWG Leads* Switch or magnet are available separately* Special leads available...
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BR-1012 : Recessed Mounted * 3/8" diameter miniature flush mounted* Press to fit* Standard 18" #22AWG Leads* Special leads upon request* Switch or magnet are available separately* ...
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BS-2011 :Surface Mounted * Mini Stick-on contact with flange* Side leads with #22AWG 18" length* Adhesive and screw mount included* Special leads on request* Switches or magnets av...
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BS-2031 :Surface Mounted * Screw mount Concealed terminals* Spacers, cover and screws included* Switches or magnets available seperately* Resistor, Diode and Supervisory Loop avail...
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BS-2071AR :Surface Mounted * Metal magnetic contacts* Ideal for commercial application or industrial use* Screws included* Standard 18" #22AWG leads* 2 Conductor jacket cable on re...
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BSD-3013 :Overhead Door Contact * Miniature floor mount* Universal magnet for flexibility in mounting* Extude aluminum casings for harsh environments* Wire: #22AWG with 22" armored...