The testo 635-1 for temperature and humidity measurement with its State-of-the-art technology and large selection of probes allows you to measure temperature, air humidity and dew point – in compressed air as well.

This ISO calibration certificate is used to calibrate your measuring device or sensor. Calibration is carried out in accordance with the ISO standard.

ISO calibration certificate U-value sensor - with 2 measuring points

ISO calibration certificate/U-value probe

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