EXTECH Heavy Duty Hot WireThermo-Anemometer

Airflow meter with telescoping probe designed to fit into small openings
The 407123 Heavy Duty Hot Wire Thermo-Anemometer uses a telescoping probe (extends up to 2 ft) which is ideal for use in ducts and ventilating systems. It can accurately measure Air Velocity and Temperature and simultaneously displays them on the dual LCD. Additional functions include Data Hold and Min/Max measuring modes. Comes complete with telescoping probe with 5.5ft cable, and 6 x AA batteries.

Telescoping probe is ideal for measuring in HVAC ducts and other small vents
Probe extends up to 7ft (2.1m)
Measure airflow down to 40ft/min
Super large 1.4" (36mm) dual LCD display
Min/Max, Data Hold