AIOMEST CFM Meter AI-856A Split Anemometer with Remote Probe — HVAC airflow & temp, 79in USB, 600‑point memory

The AIOMEST Pro Anemometer AI-856A is a split-type HVAC CFM meter that precisely measures wind speed, air temperature, and volumetric airflow for ductwork, vents, and HVAC balancing tasks.

The AI-856A combines a low-friction vane sensor with a long remote probe and a handheld display to let technicians, contractors, and building managers capture reliable airflow and temperature readings in hard-to-reach locations. It supports multiple velocity and volume units, stores hundreds of measurements, and connects to a PC for data transfer—making it a practical tool for system diagnostics, commissioning, and routine maintenance.

How accurate and sensitive is this CFM meter for HVAC work?

The AI-856A uses a finely tuned, low-resistance vane sensor to detect even subtle airflow changes while reporting results within ±3% accuracy. It monitors wind speeds from 0.001 to 100 mph and records temperatures from 32 to 113°F (0 to 45°C), allowing precise checks across typical HVAC conditions.

• Wind velocity range: 0.001–100 mph with five selectable units (m/s, ft/min, knots, km/h, mph).
• Temperature range: 32–113°F (0–45°C) for thermal context in readings.
• Air volume measurement up to 999,900 ft³/min for large ductwork applications.

What makes the split-type probe and cable useful on the job?

The meter includes a telescoping wand and a 79-inch extensible USB cable so the sensor can be positioned deep in ducts or high ceilings while the display stays at hand. A 1/4" metal thread on the sensor lets you mount it to standard tripods, freeing your hands during extended measurements or when logging multiple points.

• Long probe reach for registers, plenums, and rooftop units without awkward positioning.
• Tripod-ready 1/4" threaded hole for stable, hands-free operation during long tests.
• Removable impeller via USB port for quick replacement and maintenance on site.

Which measurement modes and data features will speed up my workflow?

The AI-856A supports Max, Min, and Average modes for both wind speed and airflow, plus 2/3 Max flow testing for performance checks. It stores up to 600 data sets and can export them to a PC for analysis, making it easy to compare points, produce reports, or archive commissioning results.

• Multiple display modes: Max/Min/Average for velocity and airflow values.
• 600-group internal memory for site surveys and multi-point verification.
• USB data transfer for continuous logging, comparison, and external analysis.

How does the AI-856A handle usability and durability on site?

The handheld display includes backlight, data hold, and auto/manual power-off for convenience in dim mechanical rooms or during long inspections. The package ships with a protective carrying case and the instrument is backed by a one-year quality warranty for added peace of mind.

• Backlight and data-hold for clear readings in low light and secure capture of values.
• Auto/manual shutoff to preserve battery life during intermittent use.
• Portable carrying case included for organized storage and safe transport.

Who is this for: The AIOMEST Pro Anemometer AI-856A is designed for HVAC technicians, commissioning engineers, facility managers, and contractors who need accurate, portable airflow and temperature measurements. It’s suited to balancing vents, troubleshooting dust collectors and fans, validating ductwork performance, and collecting measurement data for reporting and analysis.