The Extech AN310 is a professional large vane thermo-anemometer designed for precise airflow, humidity, and temperature measurements on larger duct systems. Its 4-inch (10 cm) vane captures a representative air sample, ensuring ±1.5% accuracy across a wide velocity range of 0.2 to 30 m/s (40 to 5900 ft/min). The meter simultaneously displays airflow (CFM/CMM) or air velocity alongside temperature, relative humidity, wet bulb, and dew point readings—all on a clear, easy‑to‑read display.

A built‑in thermistor provides accurate air temperature measurements from -4°F to 140°F, while the humidity sensor covers 0.1 to 99.9% RH. For comprehensive airflow analysis, the AN310 offers multipoint and timed averaging functions, allowing users to characterize variable flow conditions. Min/Max recording and Data Hold simplify field documentation, and the auto power off feature conserves battery life during extended use.

The AN310 is ideal for HVAC system balancing, manufacturing process monitoring, engineering R&D, and appliance testing. Its rugged construction and reliable performance make it a valuable tool for professionals who need accurate environmental data in the field or lab.

Features

• 4" (10 cm) large vane for accurate readings on larger ducts
• Measures air velocity, airflow (CFM/CMM), temperature, relative humidity, wet bulb, and dew point
• Air velocity range: 0.2 to 30 m/s (40 to 5900 ft/min)
• Airflow range: 0 to 99,999 CFM/CMM
• Accuracy: ±1.5%
• Temperature range: -4°F to 140°F (-20°C to 60°C)
• Humidity range: 0.1 to 99.9% RH
• Multipoint and timed average calculations
• Min/Max recording, Data Hold, auto power off
• Built-in thermistor for air temperature