Analogue handheld anemometer for determining wind speed anemo wp4 this hand, Held anemometer permits you to measure the wind speed and strength. The handheld anemometer works in accordance with the eddy current principle. The impeller mechanically picks up the wind flow. The handheld anemometer is calibrated in m/s, Km/h, Knots and the beaufort the handheld, Scale. Optionally anemometer is available with a pointer lock. A recessed thread in the handle of the handheld anemometer allows it created for attachment to a photo tripod. The wp4 is housed in a black plastic case.