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Daylight harvesting systems use daylight to offset the amount of electric lighting needed to properly light a space, in order to reduce energy consumption. This is accomplished using lighting control systems that are able to dim or switch electric lighting in response to changing daylight availability.
A complete sensor consists of a motion detector, an electronic control unit, and a controllable switch/relay. The detector senses motion and determines whether there are occupants in the space. [ 9 ] It also has a timer that signals the electronic control unit after a set period of inactivity.
Control devices can include input devices such as daylight sensors, passive infrared room occupancy sensors, and manual lighting controls, or they can be application controllers that are the "brains" of the system - using information to make decisions and control the lights and other devices. Control devices can also combine the functionality ...
The useful daylight illuminance calculation is based on three factors—the percentage of time a point is below, between, or above an illuminance value. The range for these factors is typically 100–2,000 lux. Useful daylight illuminance is similar to daylight autonomy but has the added benefit of addressing glare and thermal discomfort. [44]
The ecobee Switch+ is a smart light switch released on March 26, 2018. [ 14 ] [ 15 ] The Switch+ has a microphone with built-in Amazon Alexa , along with occupancy and daylight sensors. [ 16 ]
Convia technology integrates a facility's power delivery and other infrastructure and technology applications, including lighting, HVAC, and occupancy and daylight harvesting sensors into an energy efficient, easy-to manage platform.
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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 ...
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