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Remote photoelectric sensors used for remote sensing contain only the optical components of a sensor. The circuitry for power input, amplification, and output switching is located elsewhere, typically in a control panel. This allows the sensor, itself, to be very small. Also, the controls for the sensor are more accessible, since they may be ...
A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions. Door ...
In practice, users of security systems may intentionally reduce the effectiveness of an anti-theft system to increase its usability (see also: Password). For example, a home security system will usually be enabled and disabled with an easy-to-remember code such as "1111" or "1234", instead of a more secure combination.
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Electric eye for a garage door opener. An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam.
Motion sensors monitoring the vehicle's interior are installed in some higher end models. The simplest aftermarket alarms are one-piece units with a siren and control module. The most common type of sensor is a shock sensor and two wires (12-volt constant power and ground) which are connected to the car's battery.
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Roof insurance: ACV vs. replacement cost. Cate Deventer. March 6, 2024 at 2:46 PM ... For example, an insurance company is not likely to cover a 40-year-old roof on a replacement cost basis, since ...