HT-9829Hot Wire Anemometer 1. with telescoping probe measure in HVAC ducts and ... .other small vents,extends up to 40ft/min HT-9829Hot Wire AnemometerThe Digital Anemometer with telescoping probe measure in HVAC ducts ... anemometer, available for very low air velocity measurementsCombination of hot wire and standard thermistor, deliver rapid and precise measurementsRecords maximum/minimum ...