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Magnetic contacts are the first line of defence in the
burglar alarm industry. They are inexpensive, very reliable, and in most
cases out of sight. While PIR's and other interior detectors are an
excellent back up, it is the contact that immediately triggers the alarm
system when the door or window is open.
Contacts should be used on all entry sights because a PIR
will pick up the intruder after they are inside.
A reed switch is the heart of a
magnetic contact. It is nothing more than a simple switch that turns on
and off with a magnet. When you put the magnet near the reed the two
blades inside the glass will close at the same time. When the magnet is
withdrawn the reed blades will open causing the circuit to open and the
alarm to be triggered.
When installing contacts remember the best gaps come when you mount the
reed and magnet in parallel or head to head. You can also align the reed
side and magnet in an "L" position. Always avoid putting a magnet and
reed in a "T."
A variety of sizes and styles make magnetic contacts ideal for easy
installation in virtually any residential or commercial application.
Click for ASC fast
contact
reference chart
Complete Honeywell
Magnetic contacts
chart
 
•Sentrol 1145 •GRI 50F-12 •Nascom N25
•Ademco 943 |
1/4 RESET CONTACT
• ADEMCO 941 / MPS5 • Aleph DC-1611, DC-1631
• GRI 50R-12, 50RF-12 • Sentrol 1055 |
STUBY 3/8 RESET
•Sentrol 1125 •GRI 20RS-12 •Nascom N-175N
•Tane STB-10
•Aleph DC-1651 •Ademco 951
Regular 3/8 RESET
•Sentrol 1075 •GRI 2020-12 •Nascom N-75
•Tane TAP-10 •Aleph DC-1621 •ADEMCO 944
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SURFACE MOUNT
•Sentrol 1085T,1285T •GRI 29A •Nascom N-85T
•Tane SM35
•Aleph DC2541 •Ademco 7939 |
Surface Mount 940 STYLE
•Sentrol 1085T •GRI 29A, 129A •Nascom N285T
•Aleph PS-1523
Attractive cover keeps mounting screws, terminal screws, or EOL
resistor hidden • Standard gap: 3/4" • Complete
with spacers and mounting screws
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OH DOOR CONTACT
•Amseco ODC59A •Sentrol 2202AU,2202A •GRI
4532/4532L •Ademco 958 |
RESET 1" OR 3/4" FOR METAL DOOR |
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