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MW-UUltrasonic Flow SensorsUltrasonic heat sensors have no moving partswhich makes them almost wear free andnoiseless. They measure the flow by using thetransit time principle, one ultrasonic signal islaunched in the flow direction and one againstthe flow direction. The calculator uses thelatest innovative technology to calculate heatusage from heating systems. With its dynamicmeasuring cycle even the smallest energyconsumptions are reliably collected. The largemultifunction display permanently shows theheat consumption total; it is possible to scrollthrough the display to show all data.SPECIFICATIONNominal flow rate: Qp 0.6 to Qp 60m 3 /hMax. static pressure: Screwed 16 bar (232 psi)Flanged 25 bar (362 psi)Body materials: BrassTemperature range: Heating 10 to 130°C (50 to 266˚F)Cooling 10 to 50°C (50 to 122˚F)Maximum temp: 50°C (122˚F) for 2000 hTemperature diff: 3 to 120KSupply:3.6V Lithium batteryBattery life: 6 years (optional 11 year available upon request)Display:Multifunction 8-digit + characters LCDOutput pulse: 30Vdc max. @ 20mAPulse duration: 400m/s
An introduction to Air Pressure<strong>Sontay</strong> offer a wide range of pressure sensing and switching productsFilterCooling CoilMixing DamperOutside AirAV-EP Air Velocity ProbeReturnAirPA-500, PA-267 &PA-699 Air DP SensorsSupply AirPA-930 Air DP SwitchPA-930Air DP SwitchesThese are highly sensitive air differentialpressure switches, suitable for providingan indication of fan status and ‘dirty filter’conditions. The switching setpoint is adjustedby means of a knob mounted under the maincover. Units are supplied complete with a ductfixing kit.FEATURES■■Duct fixing kit included■■IP54 or IP65 housing optionSPECIFICATIONOperating ranges: Type: Adjustment range:PA-930-80 20 to 200Pa (0.08 to 0.80”w/c)PA-930-83 50 to 500Pa (0.20 to 2”w/c)PA-930-85 200 to 1000Pa (0.8 to 4”w/c)Max. operating pressure: 5000Pa (20”w/c)Pressure connections: 6mm i/d push-on tubingElectrical rating:1.5A (0.4)/250Vac AgCdO contactsConnections:Spade terminals and screw terminal adaptorsfor cable up to 1.5mm 2 max.Housing material:Plastic mouldingDimensions: IP54 85mm (3.35”) dia. x 59mm (2.32”)IP65 130 x 130 x 99mm (5.12 x 5.12 x 3.90”)Protection:IP54 or IP65Ambient range: Temperature –20 to +85 o C (–4 to +185°F)RH0 to 95% RH, non-condensingWeight:250g (0.55 lb)Part code DescriptionIP54 Switch HousingPA-930-80 20 to 200Pa (0.08 to 0.80”w/c) SwitchPA-930-83 50 to 500Pa (0.20 to 2”w/c) “PA-930-85 200 to 1000Pa (0.8 to 4”w/c) “Volume Price Breaks are applicableUnit Price (10-19 and 20+)PA-930-80PA-930-83PA-930-85The IP65 option DP switch isconnected (in the factory)to custom made nipplesmounted in the housing.This eliminates awkwardpiping on-site and makesthe product much easierto fit, and reducesinstallation time.Please see price listPart code DescriptionIP65 Switch Housing (including switch)PA-930-80-IP65 20 to 200Pa (0.08 to 0.80”w/c) SwitchPA-930-83-IP65 50 to 500Pa (0.20 to 2”w/c) “PA-930-85-IP65 200 to 1000Pa (0.8 to 4”w/c) “AccessoriesPA-930-B Right angle mounting bracketDFKDuct fixing kitTEE Tee piece air pressure (pack of 10)PA-TUBE-8MM PVC tube 8mm o/d x 1.5mm wall, 30m reelData sheet: PA-930.pdfNote: A duct fixing kit (DFK) is supplied with the switch, consisting of 2m(6.56 ft) 5mm (0.20") i/d plastic tubing, 2 x pitot tubes and 4 x fixing screws.& Interfaces Pressure Relative Humidity Wireless Devices Temperature Valves & ActuatorsUK Tel. +44 (0) 1732 861200 · Int. Tel. +44 (0) 1732 861225 · UK Fax +44 (0) 1732 861201 · Int. Fax +44 (0) 1732 86122631
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