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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 door operator may be triggered in various ways: Approach Sensor (such as a radar sensor) - the door opens when a user approaches it. Pushbutton - the door opens when a user presses a button. Access control - the door opens when an access control system determines the user is authorized to go through. Automatically (in the case of elevators).
Dual door open and door close buttons, in an elevator with two sets of doors, found on a ThyssenKrupp elevator from the 2010s In case of dual doors, there may be two sets of door open and door close buttons, with one pair controlling the front doors, from the perspective of the console, typically denoted <> and ><, with the other pair ...
The first footprint in Asia was set in 1995 by establishing the subsidiary Suzhou Selcom (today Wittur Elevator Components (Suzhou)) in China. In the course of years the production plant in Suzhou, China was steadily enlarged and by now more than 650,000 elevator doors are produced there on a yearly basis (2013). [3]
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.
A door operator may use sensors to prevent the door from coming into contact with a user. Full Energy operators require at least 3 sensors. Low-energy operators are not required to have safety sensors, as the door is allowed to come in contact with a user, given that the kinetic energy of the moving door is limited by the reduced moving speed.
1 Tinapa Shopping Centre: Calabar, Cross River: 80,000 m 2 (861,113 ft 2) 2007 Tinapa Business Resort Limited 2 Capital Mall: Abuja, FCT: 40,000 m 2 (430,556 ft 2) [2] Under construction N/A Churchgate Group 3 Jabi Lake Mall Abuja, FCT 26,479 m 2 (285,017 ft 2) [3] 2015 Game, Shoprite: Actis / Duval Properties 4 Ado Bayero Mall Kano, Kano ...
The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.
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