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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.
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.
Torpedo bulkhead, a type of armor plate or protective covering designed to keep a ship afloat even if the hull is struck by a shell or by a torpedo Bulkhead (barrier) , a retaining wall used as a form of coastal management, akin to a seawall, or as a structural device such as a bulkhead partition
A vestibule is composed of an ACBM ring (1) mounted to a flanged bulkhead (3) and a PCBM ring (2) mounted to a flanged bulkhead or barrel section (4). The rings, both machined from 2219 Aluminum forgings, mate at a "molded seal" (5); each ring is sealed at its inboard end by a pair of concentric o-rings (6).
Bulkhead also refers to a moveable structure often found in an Olympic-size swimming pool, as a means to set the pool into a "double-ended short course" configuration, or long-course, depending on the type of event being run. Pool bulkheads are usually air-fillable, but power driven solutions do exist.
A bulkhead is a retaining wall, such as a bulkhead within a ship or a watershed retaining wall. It may also be used in mines to contain flooding. Coastal bulkheads are most often referred to as seawalls, bulkheading, or riprap revetments. These manmade structures are constructed along shorelines with the purpose of controlling beach erosion.
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Pilot-controlled lighting (PCL), also known as aircraft radio control of aerodrome lighting (ARCAL) or pilot-activated lighting (PAL), is a system that allows aircraft pilots to control the lighting of an airport or airfield's approach lights, runway edge lights, and taxiways via radio.