Voltcraft pl 130 an anemometer environmental measurement device voltcraft pl 130 an p the voltcraft pl 130 an anemometer has been designed to measure the temperature flow velocity and air flow of gases the flow velocity can be displayed in five different units on the display and air flow can be displayed in two different units p p effective velocity average speed maximum or minimum speed can also be displayed during the measuring process the power is supplied by 3x aaa batteries s