Extech AN310 Anemometer

The AN310 is built for HVAC, ventilation testing, and airflow diagnostics where large duct measurements are required. Its 4-inch (10 cm) vane gives improved accuracy in sizeable duct cross-sections. The instrument reads air velocity (in ft/min or m/s) and also computes volumetric flow when you input the duct’s cross-sectional area. Additionally, it measures relative humidity, ambient temperature, wet bulb, and dew point for full psychrometric profiling.

On the interface side, the meter supports functions like MIN / MAX, data hold, multipoint averaging, and auto power-off to conserve battery. Its sensors combine to deliver all necessary air and humidity parameters in one sweep. The device is powered by four AAA batteries and comes with a protective hard carrying case, making it field-ready.

Features

• Large Vane for Ducts — 4-inch (10 cm) vane suited for accurate readings in larger ducts.
• Multi-Parameter Measurements — Air velocity, volumetric flow (CFM / CMM), temperature, humidity, wet bulb, dew point.
• Wide Velocity Range — From ~40 ft/min up to ~5,900 ft/min (0.2 to 30 m/s).
• Volumetric Flow Computation — Converts velocity to airflow volume when duct area is entered.
• MIN / MAX / Averaging / Data Hold — Captures extremes and stable averages for analysis.
• Auto Power-Off — Helps conserve battery life when idle.
• Compact & Portable — Runs on four AAA batteries, with a rugged carrying case.
• Multipoint & Timed Averaging — Supports averaging over multiple measurements or set time intervals.
• Clear Display — Simultaneously shows multiple measured values for quick assessment.
• Compatibility with Adapters — Accepts optional airflow cone / funnel adapters to adapt to various duct sizes.

Includes

• 4 AAA batteries
• Hard carrying case