AIOMEST AI-846A Handheld Anemometer CFM Air Flow Meter — Black, 0.001–100 mph, Data Logging & Telescopic Probe

The AIOMEST AI-846A is a handheld professional anemometer that accurately measures wind speed, air velocity, temperature and airflow volume (CFM/CMM) for HVAC, ventilation and field testing.

Compact yet rugged, the AIOMEST AI-846A combines a sensitive vane sensor, long reach cabling and a generous data buffer so technicians and installers can gather reliable airflow readings across vents, ducts and outdoor flows. It supports multiple speed and volume units, logs hundreds of measurements, and includes a protective carrying case for field use.

How precise are the airflow and wind speed readings?

The AI-846A uses a lightweight, finely balanced vane to produce stable readings across a wide range of speeds. Manufacturer tolerance is close to ±3% for typical wind speed ranges, with resolution down to thousandths of a mph for very light flows.

• Wind speed: 0.001–100 mph measurement range
• Temperature range: 32–113°F (0–45°C)
• Airflow volume: CFM and CMM up to 999,900 units
• Typical accuracy: around ±3% under normal conditions

What features help collect and analyze measurement data?

This meter stores a large number of readings and offers selectable display modes so you can capture the data you need without a constant watch. Backlight, data-hold and automatic power-off improve usability in dim, busy or extended jobs.

• Memory: stores up to 600 measurement groups for later review
• Display modes: current, max, 2/3-max, min and average readings
• Backlight and data-hold for clear viewing and frozen results
• Auto power-off to preserve battery life between measurements

How does the extendable sensor and mounting support field work?

The sensor is connected by a long USB-style cable and can be extended with a telescopic rod or attached to a tripod for hands-free monitoring. A threaded mounting hole in the wand lets you secure the probe for steady, repeatable placement in ducts or across grille openings.

• 79-inch extensible cable for remote positioning of the sensor
• Telescopic rod and threaded probe hole for tripod mounting
• Ideal for measuring hard-to-reach vents, high returns and outdoor flow
• Reduces operator fatigue during long measurement sessions

Which units and modes are available for diverse applications?

The AI-846A supports commonly used units for both wind speed and airflow volume, letting you switch quickly to whatever standard your job requires. This flexibility helps when working across different codes, clients or regional preferences.

• Wind speed units: mph, knots, ft/min, km/h and m/s
• Airflow units: CFM and CMM switchable on demand
• Data logging combined with selectable modes simplifies reporting
• Data hold and max/min functions assist troubleshooting and verification

Who is this for: HVAC contractors, building maintenance teams, ventilation installers, energy auditors and serious DIYers who need portable, repeatable airflow and wind-speed readings. If you measure duct performance, balance ventilation systems, verify A/C output or monitor outdoor airflow, the AIOMEST AI-846A provides the reach, logging and unit options to do the job efficiently while keeping measurements organized for later analysis.