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Photoelectric Security Sensors Haverhill MA

Local resource for Photoelectric Security Sensors in Haverhill. 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.

Quality Fire Protection Inc
(978) 521-8889
50 Hyatt Ave
Haverhill, MA
Keane Fire & Safety
(978) 373-3791
2 Red Oak Dr
Plaistow, NH
Overfield Security Systems
(785) 843-3434
1915 West 24th Street
Lawrence, MA
Eagle Investigation Svc Inc
(978) 682-5559
236 Pleasant St
Methuen, MA
Vip Security
(978) 258-1202
225 Broadway
Methuen, MA
Advanced Security Guard Agency
(603) 382-1300
95 Plaistow Rd # 211
Plaistow, NH
Alarms and Protective Devices of New England Inc
(978) 685-3733
7 Broadway
Lawrence, MA
S M Investigations & Security
(978) 689-0083
240 Pleasant St
Methuen, MA
Security Systems Rueschoff
(785) 843-2182
3727 West 6th Street
Lawrence, MA
Reliable Security Guard Agency
(603) 893-3840
11 Industrial Way # 2
Salem, NH

Photoelectric Sensors


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.

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