Thermo Anemometers (Hot Wire Anemometers)
- Accurate low airflow measurement for HVAC, LEV and cleanrooms
A Thermo Anemometer, also called a hot wire anemometer, is used to measure low air velocity and air temperature with high accuracy. It is one of the most reliable tools for testing ventilation systems where airflow is slow or sensitive.
Across the UK, Thermo Anemometers are widely used for HVAC commissioning, LEV testing, cleanroom validation, laboratory airflow checks and general building maintenance. If you need to measure low air speeds in ducts, vents or enclosures, this is usually the best type of instrument to use.
At Acutest, we supply professional Thermo Anemometers from leading manufacturers, including:
Testo, FLUKE, ATP Instruments, Kestrel, Chauvin Arnoux
All instruments are suitable for professional use and are available with UK calibration support.
What Is a Thermo Anemometer?
A Thermo Anemometer measures airflow using a small heated sensor. This sensor is known as a hot wire or hot film element. When air passes over it, the moving air cools the sensor. The device measures how much cooling takes place and converts this into an air velocity reading.
Because of this method, Thermo Anemometers are very accurate at low air speeds. They respond quickly to small changes in airflow. This makes them ideal for detailed testing work.
Most models measure:
- Air velocity (m/s or ft/min)
- Air temperature (°C or °F)
- Volume flow (m³/h or CFM when duct size is entered)
This allows engineers to check both speed and airflow volume using one instrument.
Why Choose a Hot Wire Anemometer?
Not all airflow meters are the same. A vane anemometer works well at medium to high air speeds. However, when airflow is slow or very controlled, a hot wire anemometer offers better accuracy.
Key Benefits:
- High Accuracy at Low Speeds: Thermo Anemometers are designed for low airflow. They are ideal for measurements below 1 m/s.
- Fast Response Time: The sensor reacts quickly to airflow changes. This helps during system balancing and troubleshooting.
- Slim Probe Design: The probe is thin and easy to insert into ducts, ceiling voids and tight spaces.
- Digital Display and Logging: Many models have clear screens, data storage and Bluetooth connectivity. This makes reporting easier.
If your work involves detailed airflow checks, a Thermo Anemometer is often the most reliable choice.
Common Applications:
Thermo Anemometers are used in many industries across the UK. They are especially useful where airflow must meet strict performance standards.
HVAC Commissioning and Balancing:/strong> During commissioning, engineers must check that air systems deliver the correct airflow. A Thermo Anemometer helps measure low supply and return air speeds in ducts and at diffusers.
LEV Testing: Local Exhaust Ventilation (LEV) systems must be tested regularly. Thermo Anemometers are commonly used to measure duct velocity and confirm system performance.
Cleanrooms and Laboratories: Cleanrooms require controlled airflow to prevent contamination. A hot wire sensor can detect even small changes in air movement.
Fume Cupboard Face Velocity: Accurate face velocity measurement is important for safety. Thermo Anemometers provide reliable readings at low speeds.
Facilities Maintenance: Building managers and maintenance teams use Thermo Anemometers for routine airflow checks and fault finding.
Features to Look For:
When choosing a Thermo Anemometer, it is important to select a model that suits your work environment.
Measurement Range: Check that the instrument covers the airflow speeds you need to measure.
Accuracy Specification: For compliance work, accuracy is critical. Look at the manufacturer’s stated tolerance.
Probe Length: Some models have fixed probes. Others have telescopic probes for better access in ducts.
Data Logging: If you need reports, choose a model with memory storage or software support.
Durability: An instrument used on-site should be strong and easy to handle.
Our technical team can help you compare models and select the right solution for your application.
Trusted Brands for Reliable Performance
- We supply Thermo Anemometers from globally recognised manufacturers known for quality and durability.
- Testo instruments are widely used in HVAC and environmental testing due to their stable sensors and user-friendly design.
- FLUKE offers reliable handheld tools built for demanding site conditions.
- ATP Instruments provides cost-effective options suited to everyday maintenance work.
- Kestrel is known for portable airflow meters with strong battery performance.
- Chauvin Arnoux delivers professional-grade measurement instruments trusted by engineers.
- Each brand offers models suited to HVAC, facilities management, industrial ventilation and compliance testing.
Order Your Thermo Anemometer Today
If you need accurate low airflow measurement, a Thermo Anemometer is the right tool for the job. Designed for precision, reliability and ease of use, these instruments help you verify ventilation performance and maintain system efficiency.
Browse our range online or contact our team for expert advice.
Call today or request a fast quotation online for professional Thermo Anemometers with UK delivery.