testo 405i Smartprobe thermal anemometer
- For measuring volume flow, air velocity and temperature
- Simple configuration of the dimension and geometry of the duct cross-section for determining the volume flow
- Convenient for working in ventilation ducts thanks to its telescopic tube, which can be extended up to 400 mm
- Really convenient to operate thanks to the testo Smart App (e.g. easy viewing of readings, measurement data trend, log function)
With the testo 405i hot wire anemometer, you can measure air velocities, temperatures and volume flows. Via Bluetooth, the readings are transmitted wirelessly straight to the testo Smart App on your smartphone or tablet. You can view the values conveniently and use numerous intelligent features:
Internal Reference :
0560 1405Description
testo 405i Hot Wire Anemometer Smart Probe
No more surprises: the testo 405i thermal anemometer with smartphone operation is a standout in the Testo Smart Probes series. This digital hot wire anemometer is ideal for carrying out measuring tasks in ventilation ducts, making it easy to determine air velocity, temperature, and volume flows.
- Versatile Measurement: The testo 405i smart probe is also suitable for measuring indoor air velocity—practical for locating non-airtight windows or drafty areas.
- HVAC Performance: Cooling capacities and heating outputs can be calculated when this testo hot wire anemometer is used in conjunction with the testo 605i thermohygrometer.
- Smart Connectivity: As a professional Bluetooth anemometer, it offers operation independent of the measuring location via your smartphone or tablet.
How Does a Hot Wire Anemometer Work?
The hot wire anemometer probe works on the principle of thermal equilibrium. A thin electrical wire is heated to a temperature above the ambient air. As air flows over the probe, it cools the wire. The instrument measures the amount of current needed to keep the wire at a constant temperature; the higher the air velocity, the more cooling occurs and the more current is required. This precise relationship allows the testo 405i to provide highly accurate air velocity and volume flow readings.
App-Based Operation and Reporting
The testo 405i combines professional measuring technology with the power of the testo Smart App. You no longer have to struggle to read displays at poorly accessible points. The app also functions as an intuitive volume flow meter and air flow volume meter: simply input the duct cross-section, and the app calculates the results automatically.
- Evaluation & Documentation: Display and log all readings on one screen.
- Smart Calculations: Timed and multi-point mean calculations are performed in seconds.
- Data Export: View measurement curves and export logs as PDF or Excel files.
System requirements:
- iOS 11 or later / Android 6.0 or later
- Bluetooth 4.0
Delivery Scope
testo 405i thermal anemometer with smartphone operation, including extendible (400 mm) telescope, batteries and calibration protocol.
Frequently Asked Questions
The testo 405i features a telescopic shaft that extends up to 400 mm (15 inches). This makes it the perfect hot wire anemometer probe for reaching deep into ventilation ducts to perform timed or multi-point traverse measurements without needing additional extensions.
Yes. When used with the testo Smart App, the instrument acts as a digital air flow volume meter. By entering the duct dimensions into the app, it automatically converts velocity readings into volume flow (m^3/h or cfm).
Absolutely. You can connect multiple Testo Smart Probes to the app simultaneously. For example, pairing the testo 405i with the testo 605i allows for the automatic calculation of heating or cooling loads in HVAC systems.
Hot wire technology is known for its high sensitivity. The testo 405i is specifically designed to provide precise measurements even at very low air velocities, making it superior to vane anemometers for indoor climate and draft detection.
This testo hot wire anemometer is powered by 3 AAA batteries and offers a battery life of approximately 15 hours, ensuring a full day of testing and air balancing for HVAC technicians.