surface mounted magnetic switch
ideal for wooden door/ window
 
FBMC37B magnetic contacts save installation time through the use of a specially formulated 3M adhesive tape.
The tape, which establishes a permanent bond between the contact and the surface, can be repositioned in the first five minutes.
A low profile and small footprint combine with reliable technology to make the  series contacts a good choice for applications where drilling holes is impractical.
A wide gap model is available to protect against false alarms from loose-fitting doors and windows. Clean surface with alcohol before attaching contact and magnet 
(this will improve the adhesion of the urethane foam to the surface).
 
*Housing: ABS material; fireproof ABS housing is available on request
*Color: white/brown
*Gap: 15-25mm, 20-25mm
*Certificates:FCC,CE ,ROHS
*Leads: 350mm in length is standard, longer leads available