Amprobe TMA5 [3503169] Mini Vane Anemometer. The Amprobe TMA5 Mini Vane Anemometer is a compact, pocket-sized tool for indoor air quality and HVAC/R technicians measuring heating, ventilation, air-conditioning, refrigeration wind flow and temperature in residential, commercial and industrial air conditioning systems. The TMA5 features a max wind speed display and has selectable temperature units °C or °F. The TMA5 has a qucik measurement response and an external temperature probe. The TMA5 is easy to use with a two button operation and convenient with it's ergonomic design and wrist strap.