WIND MARK III WIND SENSOR

WIND MARK III WIND SENSORFEATURES• Low Threshold• Low Cost• Low Power• Lightweight• Optional External HeatersClimatronics' Wind Mark III (WM-III) Wind Sensorscombine accuracy and reliability with low cost. Theyalso meet the Environmental Protection Agency(EPA) Prevention of Significant Deterioration (PSD)requirements and are well suited for general windmonitoring applications.The WM-III sensor is also available as a wind speedonly (P/N 100108-1) or wind direction only (P/N100108-2) instrument.Wind speed is sensed by a three-cup anemometerand converted to an electrical signal by a solid-statephoto chopper. A counter balanced wind vanecoupled to a precision, low torque potentiometersenses wind direction. The sensors use stainlesssteel precision ball bearings for maximum life andlow threshold. Traceability to NIST is available asan option for each anemometer cup assembly bycomparison testing against an NIST transferstandard in our wind tunnel test facility. The sensorsand their crossarm are an integral unit. Thecrossarm mounts on a 3/4-inch IPS vertical pipe stub(1.05 inch O.D.). Orientation of the crossarm is alongan East-West plane.The LEXAN cup (P/N 102138) and magnesium vane(P/N 101944) combination are standard. The Heavydutyaluminum cups (P/N 101286), and heavy-dutymagnesium vane (P/N 101292) are optional. Asensor transit case (P/N 100255) is available.Climatronics Universal Interface Module (UIM), IMP-800 series of digital data acquisition units, or almostany data loggers / data acquisition system currentlyavailable on the market are easily interfaced with theWind Mark III sensor.The Wind Mark III sensor can be provided with a 4 -20 mA current loop output. In this configuration, thepart number is 101908. Please consult the CurrentLoop Wind Sensor data sheet for additional details.

SPECIFICATIONSPERFORMANCE WM-III Wind Speed WM-III Wind DirectionELECTRICALPHYSICALAccuracy 0.25 mph (± 0.11 m/s) or ± 1.5% of ± 3 degreestrue air speed (whichever is greater)Threshold