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A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.
Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.
Common circuit diagram symbols (US ANSI symbols) An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit. These symbols are largely standardized internationally today, but may ...
An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...
This is a route-map template for the Heart of Wessex Line, a UK railway.. For a key to symbols, see {{railway line legend}}.; For information on using this template, see Template:Routemap.
This is a route-map template for the Wessex Main Line, a UK railway.. For a key to symbols, see {{railway line legend}}.; For information on using this template, see Template:Routemap.
The Wessex Saker Light Strike Vehicle was a British Army light vehicle similar to a sandrail. They were produced in the late 1980s for the British Special Air Service. Design was by Wessex and Devonport Management Limited. The frame was welded tube and power, to the rear wheels only, was from a Volkswagen 1.6 litre air-cooled petrol engine.
Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.