Temp. and humidity instrument – Testo 635-2

Model No: Testo 635-2Part No: 0563 6352

Testo 635-2 temperature and humidity measuring instrument. wide selection of optional sensors helps you in carrying out temperature and material moisture measurements on a variety of different materials.

  1. Connection of 2 plug-in probes and 3 wireless probes
  2. Measurement of temperature, air humidity, material equilibrium moisture, pressure dewpoint, absolute pressure and U-value
  3. Display of dewpoint distance, min., max. and mean values
  4. Illuminated display
  5. Protection class IP 54
  6. Instrument store for 10000 measurement values
  7. PC software for archiving and documenting measurement data.


The testo 635-2 temperature and humidity measuring instrument is excellently equipped for carrying out a variety of measurements in the field of air conditioning. A wide selection of optionally available sensors and probes can be connected to the meter to provide you the following measuring data:

  1. Relative humidity
  2. Material moisture
  3. Material compensation moisture
  4. Pressure dew point in compressed air systems
  5. HTC value
  6. Air temperature
  7. Surface temperature
  8. Core temperature
  9. Absolute pressure

Testo 635-2 is available with two sensor ports for pluggable sensors and up to 3 further temperature or moisture sensors which can be connected to the instrument via wireless along with an easy-to-read display.

Rugged, practical, easy to use
In addition to all the other measurements, the testo 635-2 temperature and humidity measuring meter also equips you to analyze levels of moisture at ceilings and walls by and calculate the dew point difference between the indoor air and the surface of the wall along with displaying min, max and mean values. Individually configured characteristic curves ensure that the material moisture content is displayed reliably
Both the meter and the menu guide are simple and comfortable to use with a backlit display which allows you to read the measurements even in poor lighting conditions. In addition, a strong protective case protects the meter effectively against any accidental knocks and bumps.

Saving, transferring and printing out data
as easy as pie with the testo 635-2 temperature and moisture meter
It also allows you to save measuring sites and allocate the measuring data to the relevant site. Create individual user profiles to perform parallel long-term and material moisture measurements. Save up to 10 000 readings – individual measurements and measurement series – to your meter. The USB cable in the scope of supply can be used to connect your moisture meter to your PC or laptop and the software allows you to log and archive your measuring data comfortably and easily. The optionally available testo fast printer also allows you to print out the measuring data on the spot.

Technical Data

Temperature – NTC
Measuring range -40 to +150 °C
Accuracy ±0.2 °C (-25 to +74.9 °C) ±0.4 °C (-40 to -25.1 °C) ±0.4 °C (+75 to +99.9 °C) ±0.5 % of mv (Remaining Range)
Resolution 0.1 °C
Temperature – TC Type K (NiCr-Ni)
Measuring range -200 to +1370 °C
Accuracy ±0.3 °C (-60 to +60 °C) ±(0.2 °C + 0.3 % of mv) (Remaining Range)
Resolution 0.1 °C
Humidity – Capacitive
Measuring range 0 to +100 %RH
Accuracy See probe data
Resolution 0.1 %RH
Absolute Pressure
Measuring range 0 to 2000 hPa
Accuracy See probe data
Resolution 0.1 hPa
General technical data
Operating temperature -20 to +50 °C
Battery type Alkali manganese, mignon, type AA
Storage temperature -30 to +70 °C



 Datasheet Download
 Instruction Manual Download

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