Allows measurement of air velocity, volume flow, and temperature.

Measure air velocity with the new Pocket-line series instrument.
The Testo 405 is a thermal anemometer that allows measurement of air velocity, volume flow, and temperature.

• Volume flow calculation up to 99,990 m³/h
• Ideal for duct measurements
• Telescopic probe extendable up to 300 mm

Testo 405 – thermal anemometer with holder, including battery.

with a transport bag, batteries, and factory calibration protocol

Simple, fast, and precise measurement of flow velocity and calculation of air volume flow in ventilation ducts.

Greater flexibility during duct measurements thanks to the wired telescopic probe (maximum length 850 mm).

Quick configuration via the app (duct settings), graphical data display, second screen functionality, and measurement data storage in the testo Smart App.

Time-based and point-based averaging.

The compact testo 416 vane anemometer with a 16 mm telescopic probe and app connectivity is ideal for simple, fast, and precise determination of air velocity and volume flow in ventilation ducts of air conditioning and ventilation systems.
By connecting to the testo Smart App, you can configure the instrument, display readings (including as a second screen), store and document measurement data directly within the app.

With telescopic handle (max. 820 mm), including nylon transport bag, batteries, and factory calibration protocol

Simple, fast, and precise measurement of flow velocity and temperature, as well as calculation of volumetric flow in ventilation ducts.

More flexibility during duct measurements thanks to the wired telescopic probe (maximum length 820 mm).

Quick configuration in the testo Smart App (channel), graphical history, second screen function, and storage of measurement data directly in the app.

Time-based and point averaging.

The compact testo 425 thermal anemometer with telescopic probe is ideal for simple, fast, and accurate determination of air velocity and volumetric flow in ventilation ducts of air conditioning and ventilation systems. Connection to the testo Smart App allows configuration, display (also as a second screen), storage, and documentation of measurements directly in the app.

Includes 3 AA batteries, USB cable, and factory calibration protocol

• Intuitive operation: clearly structured measurement menus for determining volume flow, degree of turbulence, cooling/heating output, mold detection, and long-term measurements such as CO₂ monitoring
• Convenience and compact design: Bluetooth® probes for additional ease of measurement, storage, and transport (probes sold separately)
• Clear data display: large graphic display with three-line measurement value indication
• Easy storage and processing of measurement values: internal memory and USB port for data export

Accurate and efficient measurement of all air velocity and indoor air quality parameters using a single measuring device: a multifunction measuring instrument with intuitive operation and clearly structured measurement menus. Whether you are setting air conditioning and ventilation systems, monitoring indoor air quality, or assessing comfort levels – with interchangeable high-quality digital probes, you are perfectly equipped for any measuring task (probes sold separately).