• 0563 1625
  • Usually ships in 3-5 business days



  • Humidity range: 0 to 100% RH
  • Humidity accuracy: ±2.5% RH
  • Humidity resolution: 0.1% RH
  • Temperature range: -20 to 60°C
  • Temperature accuracy: ±0.5°C
  • Temperature resolution: 0.1°C
  • Storage temperature: -20 to 50°C
  • Battery life: 100 hours


The Testo 625 thermo hygrometer is a compact, handheld instrument with a built-in humidity probe head for measuring humidity, wet bulb temperature, or dew point as well as temperature. Featuring a probe head that can be easily removed and attached to the handle via a probe cable or wireless transmitter, the Testo 625 thermo hygrometer is perfect for measuring air moisture in hard-to-reach areas.

The Testo 625 thermo hygrometer can be connected to the Smart App, which allows the user to: configure the instrument, displays graphs of the data, save measurement data, manage customers and measuring sites, document on site, and e-mail dispatch of the report. The Testo 625 thermo hygrometer measures humidity from 0 to 100% RH with an accuracy of ±2.5% and a resolution of 0.1%. Temperature readings from -20 to 60°C are accurate to ±0.5°C with a resolution of 0.1°C.