With the universal IAQ instrument, you can measure volume flows in ducts and at outlets efficiently, intuitively, and in compliance with standards.
Interactive guided measurement menus The testo 400 helps you to work in compliance with DIN EN 12599. It guides you step by step through the measurement, reliably preventing any incorrect measurements from being made.
Convenient measurement Telescopes with easy-to-read scaling make it really convenient for work in ducts.
Efficient data management Customer and measuring point information can be transferred from software allowing complex series of measurements to be conveniently analysed on a PC down to the very last detail.
Intelligent calibration concept The adjustment function allows you to store the calibration deviations determined during calibration at up to six measuring points in the digital probe. This gives you a zero-error display.
Would you welcome some advice?
In the online configurator, you can find out quickly and easily which combination of measuring instrument, probe and accessories best suits your requirements.