E Instruments offers the Mini Air HW Pro - VT50, a portable, compact, economical, and highly accurate (+ 2% of rdg) Hot Wire Thermo-Anemometer, which is widely used throughout the HVAC industry. The Mini Air HW Pro is designed for simplicity and one-hand operation. This air velocity and temperature meter is equipped with unique features such as high stability and fast response in order to measure with high accuracy.