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Sail switch
A sail switch, vane switch or flow switch is a mechanical switch that is switched on or off in response to the flow or non-flow of a fluid such as air or water. A sail switch typically operates through the use of a paddle which gets displaced due to the force of fluid moving past it. Sail switches find application in the detection of fluid flow and measurement of fan speeds. A sail switch might be used to protect a central heating system electric heating element from being energized before the air flow from the blower is established. Sail switches might also be used to alarm if a ventilation fan in a hazardous location fails and air flow has stopped. For some HVAC systems, a sail switch can activate an electronic air cleaner, a humidifier, or other equipment in response to airflow from the system fan.
==External links==
*http://electronicaircleaners.com/s688a1007.aspx
*Honeywell Sail Switch Product data http://docs.electronicaircleaners.com/honeywell_s688_product_data.pdf
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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