Measures air humidity, material moisture balance and pressure dew point
Measurement data transfer possible via radio (optional)
Connection of 3 radio probes
Displays dew point margin, minimum/maximum and
average values
Display illumination
On-site print-out with testo log printer (optional)

Cyclical printing of values on testo log printer

Storage for 10,000 measured values
Software for PC connection
Characteristics can be freely stored for direct visual display of material dampness

Radio sensor and module (e.g. RS stock no.: 516-0438)
Temperature probe type K (e.g. RS stock no.: 512-0519)
Multi-functional and special sensor (e.g. stock no.: 512-0632)
Carry case and additional accessories (e.g. stock no.: 512-0446)

  testo 635-1 / -2 (without probe), battery, software & USB cable (635-2 only), instructions

Accurately measure humidity, material moisture balance, U-value and dew point in your work environment with this hygrometer from Testo. It can store up to 10,000 measurement values for ease of comparing and analysing readings. An integrated USB interface helps you connect the device to computers for data downloads and processing. For added convenience, it's supplied with PC software that allows you to easily save and analyse your data. The hygrometer also comes with a calibration protocol for ease of setup.

• Robust battery life of 200 hours for portable use
• Broad operating temperature range of -20°C to +50°C for use in demanding environments
• Light weight of 428g for ease of handling
• IP54 rating means it's protected against limited amounts of dust and water sprays from all directions

• Food processing industry
• Saunas
• Museums
• Neonatal incubators

Yes, this hygrometer has a high-resolution LCD screen that shows the minimum, maximum and mean values recorded. The display is also illuminated, which makes it easier to read the data.