With this practical kit, you can control and calibrate humidity probes quickly and easily.

The U-value is the most important value for proving the heat loss of a building. With the testo 635-2 thermohygrometer and compatible accessories from the U-value set, determining the U-value is now easier than ever.

With the compact testo 625 thermohygrometer, you can measure air temperature and relative humidity easily, quickly and precisely to assess indoor air quality or ensure optimum conditions in storage rooms. The testo Smart App supports you with useful functions, e.g. configuration, display (also as second screen) and storage as well as documentation of the measured values directly in the App.

This ISO calibration certificate certifies that your measuring instrument or probe is calibrated. Calibration is carried out according to the ISO standard.

ISO humidity calibration certificate - with 1 measuring point

ISO calibration certificate/humidity

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