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Humidity meter

Meet the highest demands: cutting-edge technology from Testo

Air humidity is one of the most important measurement parameters. Depending on the application, different performance requirements are made when it comes to a humidity meter. That is why Testo offers an unbeatable diversity of instruments: from the simple humidity meter, via thermohygrometers and multifunction measuring instruments, through to the humidity data logger with software.

Outstanding performance: humidity measurement with Testo

A Testo humidity meter offers you all-round outstanding quality:

  • Extremely long-term stability of Testo's humidity sensor technology in every humidity meter.

  • Highly sensitive integrated or external probes for humidity measurement, even in complex environments.

  • Robust, compact housings with large, illuminated display.

  • Special technology for critical applications in industry, research or special high humidity areas.

Everything is possible: measure air humidity with Testo

More efficiency always implies: the right humidity meter

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Know-How Series

Measuring humidity in rooms

Register now for the five-part know-how series "Air humidity in rooms" and you will easily receive these technical papers as a free download by e-mail. Free of charge and without obligation.

To the registration

Humidity is so important for a good indoor climate

Humidity in European regulations

Humidity, the new reference variable?

Thermodynamics and enthalpy

And much more ...

What does a Testo humidity meter measure?

A humidity meter records the water vapour content of the air. The warmer the air, the more water vapour it can absorb before it becomes saturated and reaches maximum air humidity.

Air humidity in rooms – you should keep an eye on this

The air humidity in a room depends on several factors. It is important to keep an eye on the following elements in order to ensure optimum air humidity over the long term:

  • Production of humidity in the room, for example by the number of employees in an office.

  • Ventilation behaviour: how often ventilation is used and how high the humidity and temperature of the circulating outside air are.

  • Ability of walls and furnishings to absorb humidity.

  • Transport of humidity by external building components.

Know-how: this is how to choose your ideal humidity meter

The requirements for humidity measurement vary: no matter whether it involves air velocity & IAQ measurement or the cold chain, industrial moisture measurement or cleanrooms. Depending on the measuring task, either a conventional humidity meter or a complex system which handles critical applications effortlessly and reliably is the right one for you. So, the ideal humidity meter does not have to outclass absolutely every other one in technical terms. It needs to provide you with optimum support for your specific task:

Air humidity in rooms – you should keep an eye on this

The air humidity in a room depends on several factors. It is important to keep an eye on the following elements in order to ensure optimum air humidity over the long term:

  • Production of humidity in the room, for example by the number of employees in an office.

  • Ventilation behaviour: how often ventilation is used and how high the humidity and temperature of the circulating outside air are.

  • Ability of walls and furnishings to absorb humidity.

  • Transport of humidity by external building components.

Measure air humidity – measuring tips for even greater precision

A Testo humidity meter is easy to operate and highly precise. The following tips will enable you to get the best out of your humidity meter:

  • Adhere to the measuring distance from colder surfaces.

  • Set the probe up in the middle of the room at a height of about 60 cm.

  • Move the humidity meter gently to and fro during the measuring process in order to keep the acclimatization time as short as possible.

  • Do not breathe on the sensor. Warm breath can falsify the humidity measurement.

When humidity measurement is not everything:

testo Smart App

One App for all applications.

The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems.

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