Dwyer Instruments air velocity meters and anemometers are designed for measuring wind velocity, air speed, air temperature, pressure, windchill and relative humidity in laboratory fume hoods, weather monitoring stations and HVAC inspection and duct traverses. The brand's air velocity meters feature a compact design for maximum portability, a spirit level ensuring accurate measurements (+/- 5 per cent) and large scales for providing dual-sided visibility and an easy read. Dwyer Mark II Series wind speed indicators show accurate wind speed readings on the liquid-filled scale in both the Beaufort configuration (1-12) and miles per hour (0-80). Choose from a wide range of these thermo-anemometers with air velocity variants varying from 0 to 6000 FPM on Raptor Supplies, an authorised Dwyer Instruments distributor.