EM20 Thermo-anemometer

Supco EM20 Thermo-Anemometer is a compact, trade-tough airflow & temperature meter for HVAC pros. Ideal for quick checks at grilles and diffusers, it helps you diagnose airflow issues faster and cut call-backs. Built for Aussie job sites—no dramas.

• Velocity range 80–4000 fpm (≈0.4–20 m/s) — covers typical supply/return outlets so you can verify design airflows on the spot.
• Temperature range −10 °C to 50 °C — capture temp alongside velocity to explain hot/cold complaints in one pass.
• Multiple units (fpm, m/s, mph, km/h, knots, Beaufort) — match site specs and client reports without fiddly conversions.
• Backlit LCD + Data Hold — grab stable readings in roof spaces and plantrooms; no torch juggling.
• Auto power-off — saves batteries on long service runs.
• Hard carry case included — protects your meter in the van between jobs.

Why This Product Matters

Ever been on a summer call-out where the client swears the new split “just isn’t pushing air”? You hop up, it’s nudging 40 °C on the roof, and you need a quick, fair dinkum check at the outlet. The EM20 gives you instant velocity and temperature so you can show the numbers, adjust dampers if needed, and be on your way. For a wider range of airflow instruments, see our Test & Measurement collection.

Pro Tip

For more reliable results at grilles, take multiple readings across the face and average them. That’s in line with Australian balancing practice, which recommends a series of readings because duct/terminal airflow is non-uniform. Too easy.

Compatibility & System Info

• Use at diffusers, registers, and return grilles on residential & light commercial systems.
• Great for commissioning checks, maintenance, and fault-finding.
• If you need in-duct traverses and L/s auto-calc, consider a dedicated hot-wire anemometer like Fieldpiece STA2 (linked below).

Local note: Whether you’re balancing an office in Sydney humidity or chasing airflow on a Brisbane roof in the arvo sun, the EM20’s backlight and data-hold make life easier—she’ll be right.

What’s Included

• Supco EM20 Thermo-Anemometer
• Hard carrying case
• User documentation

Specifications

Specs summarised from manufacturer documentation.

Warranty & Returns

Backed by manufacturer warranty with HVAC Shop returns support. If your item arrives faulty or is deemed faulty on inspection, we’ll sort it—no worries.

FAQs

Does the EM20 calculate L/s or CFM automatically?
It reads air speed and temperature. To estimate volume flow, measure outlet free area and multiply by average velocity, or use a model with built-in L/s calc/hot-wire probe (see Fieldpiece STA2 below).

Is it suitable for balancing?
For quick checks at grilles—yes. For full TAB, follow multi-point methods and consider hot-wire or pitot traverses per Australian practice.

Can I use it outdoors?
It’s designed for HVAC tasks; protect the instrument from rain and heavy condensation to maintain sensor accuracy.

Related Products

• Testo 410i Vane Anemometer — A helpful pocket vane when you want a compact, app-driven outlet check.
• Fieldpiece STA2 Hot-wire Anemometer — For duct traverses and automatic L/s.