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Electromagnetic Alarms Alabaster AL

Local resource for Electromagnetic Alarms in Alabaster. Includes detailed information on local businesses that provide access to Electromagnetic Alarms, keyless entry, garage door opener, driveway alarm, as well as advice and content on electromagnetic and electronic alarm system retailers and stores in your location.

ACI Alarm Concepts Inc
(205) 991-6262
320 Cedar Hill Dr
Birmingham, AL
Adt Security Systems
(205) 943-6502
120 W Park Dr
Birmingham, AL
A A C Alabama Alarm Company
(205) 322-6062
1644 13th St S
Birmingham, AL
Systems Group
(205) 588-2915
2805 6th Ave S
Birmingham, AL
Alabama Security Alarm Maintenance
(205) 664-9895
178 Park Place Lane
Alabaster, AL
ADS Security
(205) 532-4064
100 Oxmoor Blvd.
Birmingham, AL
On Guard Security
(205) 298-8131
3794 Poe Dr
Birmingham, AL
Alarm One
(205) 278-3888
2717 3rd Ave South
Birmingham, AL
(205) 801-5179
2333 Park Pl
Birmingham, AL
Best Access Systems
(205) 663-1950
235 Scotland Dr
Alabaster, AL

Electromagnetic Detection

Most intrusion detection systems in use today utilize some form of electrical circuit running through wires, mechanisms, metalized tape or foil. If any part of the electric circuit running through two pieces of metal in the door locks or window lock mechanisms , or if a strip of metallic tape on the window glass is broken, it trips an alarm.

Circuits work well when an intruder attempts entry as one would expect, by opening a door or window. Burglars however, know how to use crowbars and other burglary tools to get through doors without disrupting these electrical circuits. In warm climate regions, houses may have thin walls, and entry can be gained by cutting through a wall. Tape or wire mesh in the wall would have to be torn or cut through to gain entry, thus tripping the security alarms .

Limitations occur in a circuit system because the gap or break can be bridged when the burglar breaks the tape or magnetic connection with a long wire or piece of metalized tape, prying open a door or window frame without setting off the alarm.

Magnetic Contact Circuits

Electromagnetic systems are often used on doors to apartment buildings and secure areas in government offices. They use a magnet in one sealed enclosure and a switch in another sealed enclosure and when the magnetic contact is broken, the alarm signal sounds.

In order to open a door protected with a magnetic door latch, a button has to be pushed by an attendant to allow the door to be opened by the visitor...

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