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A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.
One category of presence sensing devices is Photoelectric Sensors. Light Curtains also fall into this category. Light curtains use many infrared light beams to form a perimeter around machinery. When two or more consecutively adjacent beams are interrupted, a kill-switch stops the machine until the boundary is reset.
However, it is prohibited to knowingly walk past a motion sensor which switches on a light on Shabbat if the street or place is dark and because the turning on of the light substantively benefits the person, and it is a pesik reisha denicha leih (Aramaic: פסיק רישא דניחא ליה, loose translation: "an inevitable resultant action ...
A PIR motion detector used to control an outdoor, automatic light. A camera trap with PIR motion detector. An indoor light switch equipped with PIR-based occupancy sensor [1] A PIR-based motion detector is used to sense movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically activated lighting ...
In 2007, HomeSeer released the HSM100, a battery operated Z-Wave 'multi-sensor' with built-in sensors for motion, temperature and light level. The HSM100 was well suited for home automation events that relied on some combination of its sensor data.
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A twilight switch is an electronic component that allows the automatic activation of a lighting circuit when natural light drops in a given environment. Among a large number of uses, the most common is to enable automatic lighting of streets, roads, highways, roads, gardens, courtyards, etc., when sunlight drops below a certain level (e.g.: a ...