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Photoelectric Security Sensors Derry NH

Local resource for Photoelectric Security Sensors in Derry. Includes detailed information on local businesses that provide access to Photoelectric Security Sensors, industrial photoelectric sensors, photoeye, infrared, as well as advice and content on where you can find retailers and companies, locally, that provides these products in your area.

Hampshire Fire Protection Co
(603) 224-6638
8 N Wentworth Ave
Londonderry, NH
 
Strategic Partnering Group
(603) 898-1602
5 Tudor Dr
Salem, NH
 
Eastern Alarms & Communications
(603) 382-4433
3 Commerce Park Drive
East Hampstead, NH
 
Merrimack Valley Guard Svc Inc
(603) 647-8330
23 Merrimack St
Manchester, NH
 
Amoskeag Fire Equipment
(603) 668-6280
431 Merrimack St
Manchester, NH
 
Detection Alarms- Inc.
(603) 471-7072
9 Londonderry Rd
Londonderry, NH
 
Reliable Security Guard Agency
(603) 893-3840
11 Industrial Way # 2
Salem, NH
 
Illinois Security Services and Alarms Inc
(217) 477-0283
1007 North Vermilion Street
Danville, NH
 
Advanced Security Guard Agency
(603) 382-1300
95 Plaistow Rd # 211
Plaistow, NH
 
Acoustic Development Assoc
(603) 669-2720
55 Legacy Dr
Manchester, NH
 

Photoelectric Sensors

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Photoelectric detection systems use a light-sensitive cell and a directed light source which points directly at the cell. Photoelectric security systems can be classified as motion detection systems since an object or person must move across the photoelectric connection to break the light transmission to the sensor.

The source transmits invisible light beams to the adjacent cell or sensor. Often an infrared filter covers the light source to make it non-visible to intruders. If an intruder crosses the light beam, it breaks the beam's continuous contact with the photoelectric cell and trips the alarm. Mirrors can be installed with photoelectric security systems in order to allow one light beam to be projected across a large area, thus allowing a criss-crossing of the light beam across a room. This makes it much more difficult for an intruder to crawl under, or step over the light beam.

Photoelectric may seem an old technology, however it is still in use in many home security systems.

Learn more about home security systems .

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