Humidity Measurement Instruments

ROTRONIC humidity instruments

ROTRONIC offers a comprehensive range of humidity instruments - transmitters, data loggers, indicators, probes, sensors and humidity generators - for the measurement and calibration of relative humidity, dew point, water activity and other humidity parameters.

We offer problem-free, accurate measurement results through the most stable humidity sensors in the industry combined with our unique HygroClip® digital technology. Our instruments and probes measure both humidity and temperature because temperature is critical to the proper measurement and interpretation of humidity.

Humidity and temperature measurement products

The ROTRONIC product range includes humidity temperature transmitters for HVAC, BMS, manufacturing and process control applications, handheld, portable humidity temperature indicators, humidity temperature data loggers, humidity temperature generators for metrology laboratories, and meteorological humidity temperature probes, as well as water activity indicators for quality control of foods, pharmaceuticals and cosmetics. For special applications we offer a line of intrinsically safe humidity probes and transmitters.

High-accuracy humidity probes

The HygroClip2 is a completely new type of humidity probe in a class of its own in terms of accuracy and performance. Thanks to our new AirChip3000 technology it also boasts a unique calibration and adjustment process as well as many other superb innovations. ROTRONIC has taken humidity measurement technology to a whole new level of performance and reliability: the HygroClip2 offers you the best possible reproducibility and a superb system accuracy of <±0.8%rh and ±0.1K.

Humidity transmitters

The HygroFlex series of humidity transmitters is ideal for all applications where exact measurement of humidity and temperature is of decisive importance; e.g. the food and pharmaceutical industries, printing and paper industries, meteorology, agricultural sector, archaeology, climatology, etc. There is hardly a field today in which these parameters may be ignored. It is ultimately the measuring task on hand that defines the instrument that best covers your needs.

Humidity data loggers

The long-term recording of humidity and temperature conditions is very important in storage, shipping, production processes, test facilities and many other areas.

Once logged, the temperature and humidity data can be evaluated statistically. This provides valuable information on conditions that can have an influence on people, materials and objects.

The ROTRONIC data loggers fulfil the requirements of FDA 21 CFR Part 11 and GAMP 4. They have a degree of functionality currently not achieved by any other logger, while being highly accurate and easy to use. Data can be shown in graph or table form. A large range of interchangeable probes means simple maintenance and flexibility in different applications, and loggers are available in a range of configurations to suit most uses.

Handheld instruments for humidity measurement

The ROTRONIC HygroPalm handheld instruments of the AirChip3000 generation are the perfect instruments for climatic measurements. They are extremely precise and feature many practical functions, but are easy to use.

HygroPalms are adjusted and configured during production and are therefore ready for immediate use. They can be configured for specific applications with user-friendly HW4 software or directly on the keypad. A large range of interchangeable probes enables easy and flexible use, straightforward maintenance and simple calibration.

Humidity and temperature generators

Many customers already use our HygroGen humidity generators to calibrate their humidity measuring instruments themselves. A significant advantage is the minimisation of instrument downtime and the reduction in administrative work for the customer.

Benefits of the HygroGen humidity and temperature generator include:

  • Generates stable humidity and temperature conditions
  • Transportable calibration instrument
  • Humidity equilibrium typically reached in 3min or less
  • Suitable for the calibration of most relative humidity instruments
  • Integrated touch-screen PC and USB hub
  • Ability to connect and calibrate up to five probes simultaneously
  • Standard external heated sample loop connection
  • Integrated dryer cell condition monitoring
  • Digital water level indication
  • Easy-to-use graphical user interface
  • Direct certificate printing


ROTRONIC was founded in 1965. We employ some 360 people, and market our products in more than 40 countries worldwide, with branches and agencies in the US, Germany, the UK, France, Taiwan, Singapore and China. Our emphasis is partly on trade in IT and industrial products, and partly on the development and production of humidity and temperature sensors at our headquarters in Bassersdorf, Switzerland.

Contact Details

Grindelstrasse 6
CH-8303 Bassersdorf
+41 44 838 11 11
+41 44 838 14 83

Available White Papers


Humidity and Temperature Transmitters 18 January 2016 The new HygroFlex5-EX series, which meets international standards, is the latest development in two-channel transmitters for the exact measurement of humidity and temperature in explosive atmospheres.


Humidity and Temperature Measuring Instruments 18 January 2016 For more than 40 years, ROTRONIC has been combining technical innovation and Swiss quality.

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