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Electromagnetic Alarms Arnold MO

Local resource for Electromagnetic Alarms in Arnold. 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.

A & M Communications Inc
(314) 729-2100
4460 Telegraph Rd
Saint Louis, MO
Gateway Alarm Inc
(314) 487-2224
5923 Weber Rd
Saint Louis, MO
Alarm Monitoring Company
(314) 644-5255
2001 S Hanley RD
St. Louis, MO
Vann Gard Electronics Llc
(314) 524-7422
6106 Madison Av
Saint Charles, MO
Alarm 24 Inc
(636) 970-1777
412 S Church St
Saint Charles, MO
Senna Systems Inc
(314) 785-1201
9291 Watson Ind Park
St. Louis, MO
All Auto Alarm Center
(314) 351-3131
4611 S Kingshighway Blvd
St. Louis, MO
Centerpoint Technologies
(314) 644-5255
2001 S Hanley Rd
Saint Louis, MO
Adt Security
(636) 724-9975
3701 Elm St
Saint Charles, MO
Aaacomputing Llc
(314) 437-3428
816 Kehrs Mill Rd
Saint Charles, MO

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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