Sail switch

A sail switch, vane switch or flow switch is a mechanical switch that is actuated on or off in response to the flow or non-flow of a fluid such as air or water.^[1] A sail switch typically operates through the use of a paddle or a diaphragm which gets displaced due to the force of fluid or air moving past it. Sail switches find application in the detection of fluid flow and measurement of fan speeds.^[2] A sail switch might be used to protect a fan forced pellet stove, central heating system, electric heating element from being energized before the air flow from the blower is established.^[2] 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.^[3]

References

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^ Matthew J. Darr; et al. (2007). "A Robust Sensor for Monitoring the Operational Status of Agricultural Ventilation Fans". Transactions of the ASABE. 50 (3): 1019. doi:10.13031/2013.23142.
^ ^a ^b Steven J. Hoff; et al. (June 2009). "Real-Time Airflow Rate Measurements from Mechanically Ventilated Animal Buildings". Journal of the Air & Waste Management Association. 59 (6): 685. doi:10.3155/1047-3289.59.6.683. PMID 19603736. S2CID 46390769.
^ "Honeywell S688A1007 Sail Switch SPDT". Bel-Aire. Retrieved 20 December 2015.

External links

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Vane Style Flow Switches

v t e Switch types
Analogue switch Banyan switch Battery isolator Cam switch Centrifugal switch Company switch Contact protection Crossbar switch Crossover switch Cryotron DIP switch Dry contact Electric switchboard Float switch Humidistat Infinite switch Inertial switch Kill switch Key switch Knife switch Limit switch Latching switch Light switch Lightning switch Magnetic proximity fuze Magnetic starter Magnetic switch Mercury switch Miniature snap-action switch Optical switch Photoswitch Piezo switch Placebo button Pull switch Push switch Push-button Railroad switch Reed switch Rotary switch Sail switch Sea switch Sense switch Silicone rubber keypad Softswitch Spark gap Staircase timer Stepping switch Strowger switch Thermostat Time switch Touch switch Transfer switch Vacuum switch Vandal-resistant switch Wireless light switch Zero speed switch

v t e Heating, ventilation, and air conditioning
Fundamental concepts	Air changes per hour (ACH) Bake-out Building envelope Convection Dilution Domestic energy consumption Enthalpy Fluid dynamics Gas compressor Heat pump and refrigeration cycle Heat transfer Humidity Infiltration Latent heat Noise control Outgassing Particulates Psychrometrics Sensible heat Stack effect Thermal comfort Thermal destratification Thermal mass Thermodynamics Vapour pressure of water
Technology	Absorption-compression heat pump Absorption refrigerator Air barrier Air conditioning Antifreeze Automobile air conditioning Autonomous building Building insulation materials Central heating Central solar heating Chilled beam Chilled water Constant air volume (CAV) Coolant Cross ventilation Dedicated outdoor air system (DOAS) Deep water source cooling Demand controlled ventilation (DCV) Displacement ventilation District cooling District heating Electric heating Energy recovery ventilation (ERV) Firestop Forced-air Forced-air gas Free cooling Heat recovery ventilation (HRV) Hybrid heat Hydronics Ice storage air conditioning Kitchen ventilation Mixed-mode ventilation Microgeneration Passive cooling Passive daytime radiative cooling Passive house Passive ventilation Radiant heating and cooling Radiant cooling Radiant heating Radon mitigation Refrigeration Renewable heat Room air distribution Solar air heat Solar combisystem Solar cooling Solar heating Thermal insulation Thermosiphon Underfloor air distribution Underfloor heating Vapor barrier Vapor-compression refrigeration (VCRS) Variable air volume (VAV) Variable refrigerant flow (VRF) Ventilation Water heat recycling
Components	Air conditioner inverter Air door Air filter Air handler Air ionizer Air-mixing plenum Air purifier Air source heat pump Attic fan Automatic balancing valve Back boiler Barrier pipe Blast damper Boiler Centrifugal fan Ceramic heater Chiller Condensate pump Condenser Condensing boiler Convection heater Compressor Cooling tower Damper Dehumidifier Duct Economizer Electrostatic precipitator Evaporative cooler Evaporator Exhaust hood Expansion tank Fan Fan coil unit Fan filter unit Fan heater Fire damper Fireplace Fireplace insert Freeze stat Flue Freon Fume hood Furnace Gas compressor Gas heater Gasoline heater Grease duct Grille Ground-coupled heat exchanger Ground source heat pump Heat exchanger Heat pipe Heat pump Heating film Heating system HEPA High efficiency glandless circulating pump High-pressure cut-off switch Humidifier Infrared heater Inverter compressor Kerosene heater Louver Mechanical room Oil heater Packaged terminal air conditioner Plenum space Pressurisation ductwork Process duct work Radiator Radiator reflector Recuperator Refrigerant Register Reversing valve Run-around coil Sail switch Scroll compressor Solar chimney Solar-assisted heat pump Space heater Smoke canopy Smoke damper Smoke exhaust ductwork Thermal expansion valve Thermal wheel Thermostatic radiator valve Trickle vent Trombe wall TurboSwing Turning vanes Ultra-low particulate air (ULPA) Whole-house fan Windcatcher Wood-burning stove Zone valve
Measurement and control	Air flow meter Aquastat BACnet Blower door Building automation Carbon dioxide sensor Clean air delivery rate (CADR) Control valve Gas detector Home energy monitor Humidistat HVAC control system Infrared thermometer Intelligent buildings LonWorks Minimum efficiency reporting value (MERV) Normal temperature and pressure (NTP) OpenTherm Programmable communicating thermostat Programmable thermostat Psychrometrics Room temperature Smart thermostat Standard temperature and pressure (STP) Thermographic camera Thermostat Thermostatic radiator valve
Professions, trades, and services	Architectural acoustics Architectural engineering Architectural technologist Building services engineering Building information modeling (BIM) Deep energy retrofit Duct cleaning Duct leakage testing Environmental engineering Hydronic balancing Kitchen exhaust cleaning Mechanical engineering Mechanical, electrical, and plumbing Mold growth, assessment, and remediation Refrigerant reclamation Testing, adjusting, balancing
Industry organizations	AHRI AMCA ASHRAE ASTM International BRE BSRIA CIBSE Institute of Refrigeration IIR LEED SMACNA UMC
Health and safety	Indoor air quality (IAQ) Passive smoking Sick building syndrome (SBS) Volatile organic compound (VOC)
See also	ASHRAE Handbook Building science Fireproofing Glossary of HVAC terms Warm Spaces World Refrigeration Day Template:Fire protection Template:Home automation Template:Solar energy

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Sail switch

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