Testo SE & CO KGaA 

Humidity/temperature measuring device testo 635-1

The humidity and temperature measuring device is suitable for checking air humidity, temperature, absolute pressure and dew point in cold stores, production rooms and storage rooms. It is equipped with two probe inputs for plug-in probes with cables. In addition, the device can receive measured values from up to three temperature or humidity probes via wireless measurement data transmission and display them on the screen.

  • Illuminated display
  • Convenient menu structure and intuitive operation
  • Calculates dew point and dew point distance
  • Display of min/max and mean values
  • Printout of data with testo fast printer (available separately)
Measuring ranges depend on the probe used. At least one probe is required for operation. Please order separately.
Radio probes and radio modules are required for wireless measurement data transmission. Please order separately.

Scope of supply: Humidity/temperature measuring device, calibration protocol, batteries
Relative humidity:0 ... 100 %
Resolution rel. humidity:0.1 %
Resolution temperature:0.1 °C
Display:Digital
Dimensions (WxDxH):74 x 46 x 220 mm
Weight:428 g
Battery/rechargeable battery:3 x AA
IP code:IP 54
Humidity/temperature measuring device testo 635-1


Humidity/temperature measuring device testo 635-1
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Humidity/temperature measuring device testo 635-1

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