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. Its distinctive appearance and exceptional durability has turned it into one of the world’s most iconic wind instruments. It has served meteorological offices, airports, docks, offshore rigs and power stations worldwide for over fifty years.
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 is particularly well suited to coastal and cyclonic areas.
The equipment requires little-to-no maintenance and can be deployed remotely and left completely unattended.
The IM147 can be used with a suitable data logger, the Munro Data Acquisition System or with analogue dial indicators.
Wind Speed Sensor
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 rotor turns within a fixed stator coil assembly producing a variable AC current. This generates an output voltage that is proportional to the wind speed.
The IM124 is also available as a standalone sensor.
Wind Direction Sensor
The IM145 Wind Direction Vane is a sensitive yet robust element, employing a magnetic encoder to give high accuracy wind direction measurements.
Compatible Display Modules
- Up to 6 IM124A Wind Speed Dial Indicators
- Up to 6 IM125A Wind Direction Dial Indicators
- 150/DAS Digital Graphical Recorder
- A suitable data logger (analogue input)