475-0T-FM-AV is a Convenient all-in-one series 475-AV air velocity kit. This is small, light and easy to use. No set-up or leveling needed. An indispensable test kit for the plant engineer, and HVAC technician that must balance system air flows at start-up. Typical applications include building commissioning, building HVAC test and balance, critical environment testing, industrial process verification and instrumentation validation.