Extech 407123 Hot Wire Thermo Anemometer Reviewhttp://tinyurl.com/m3edwke Extech 407123 Hot Wire Thermo Anemometer Telescoping probe is designed to fit into HVAC ducts and small openingsProbe extends to 4 feet (1.22m)Measuring range 40 to 3940 feet/minuteChoice of readings in feet/min, meters/second, kM/hour, MPH or knotsMin/Max and Data Hold
