Vaisala Wind Sensor WM30

Accurate wind speed and direction measurement all in one compact and economical instrument. ACCURATE WIND MEASUREMENT Vaisala Wind Sensor WM30 is a compact and economical wind speed and direction sensor. The rotating cup anemometer at the top of the unit provides a linear response to wind speed. The vane, which is attached to the body of the unit, provides a fast response to wind direction. The shape, dimensions, and material of the cups all contribute to accurate, reliable measurements. The cups are carefully tested to give a linear response between the wind speed and the angular velocity of the cup wheel. The wind vane is located directly beneath the cup assembly and is made of a durable, lightweight material that ensures fast response and low inertia. Features:
  • Compact and light design is optimal for mobile applications
  • Low power consumption
  • Fast and linear response to wind
  • Choice of one-wiper or two-wiper potentiometer models


A relay contact output is provided for wind speed. The wind speed can be recorded either by counting the number of pulses within a fixed time period, or by measuring the time between successive pulses. A potentiometer detects the position of the vane. The potentiometer features low starting and running torque, linear resistance, and long operation life. It has a single wiper with an open gap of fewer than 5 degrees. With constant voltage supplied to the potentiometer, the output voltage is directly proportional to the azimuth angle.


The cups and vane are made of reinforced polyamide (PA) plastic which guarantees a rigid structure even at the highest wind speeds. The electronics are located inside an anodized aluminum core which creates not only a firm body, but a watertight enclosure for the electronics as well. This provides full protection against water, dust, pollutants, and electromagnetic interference.


Wind Sensor WM30 for mobile applications