The vane, which is attached to the body of the unit, provides a fast response to wind direction. The rotating cup anemometer at the top of the unit provides a linear response to wind speed. The IM145 Wind Direction Vane is a sensitive yet robust element, employing a magnetic encoder to give high accuracy wind direction measurements. A New Combination Anemometer, Wind Vane and Wind Direction Recorder for Mt. Vaisala Wind Sensor WM30 is a compact and economical wind speed and direction sensor. The IM124 is also available as a standalone sensor. This generates an output voltage that is proportional to the wind speed. The rotor turns within a fixed stator coil assembly producing a variable AC current. The IM124 Cup Anemometer is a self-powered, electro-mechanical unit, capable of measuring wind speeds of up to 180 knots (equivalent to 200 mph, 90 m/s and 320 km/h).
The IM147 can be used with a suitable data logger, the Munro Data Acquisition System or with analogue dial indicators. The equipment requires little-to-no maintenance and can be deployed remotely and left completely unattended. Wind direction is commonly measured using a wind vane to tell the direction of. It is particularly well suited to coastal and cyclonic areas. Many different anemometers use turning blades, pressure plates, sound, and tubes to measure the wind speed. Its rugged, corrosion-resistant design means that it is fully operable even in the most adverse environments, including heavily salt-laden atmospheres and lightning-prone areas. It has served meteorological offices, airports, docks, offshore rigs and power stations worldwide for over fifty years. Its distinctive appearance and exceptional durability has turned it into one of the world’s most iconic wind instruments. The IM147, Munro Instrument’s flagship wind speed and direction sensor, is a dual in-line unit comprising an IM124 Cup Anemometer and an IM145 Wind Direction Vane.
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