Humidity - Measurement and Monitoring of relative Humidity

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Find out in this short film how relative humidity (RH) arises, how it is measured and why.


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The main fields of use for humidity measuring equipment lie in the pharmaceutical and food industries, heating, ventilation and air-conditioning (HVAC) applications as well as drying processes and storage. Measurement of air humidity moreover plays a key role in meteorology, while archives and museums also use data loggers or humidity measuring instruments. Apart from humidity, temperature is often also measured. Rotronic humidity measuring instruments therefore usually also measure temperature at the same time.

Do you already know our free Humidity Calculator for dew point, specific humidity and relative humidity?

Humidity Calculator (Online Tool)

Recommended Products for humidity and temperature measurement:

  1.  RMS - Rotronic Continuous Monitoring System

    RMS - Rotronic Continuous Monitoring System

    High quality standards in production and storage necessitate a comprehensive monitoring system that delivers measured data reliably. The adaptive RMS Rotronic Monitoring System is the perfect solution for a wide range of applications.

    Learn More
  2. HygroLog HL-1D - CH

    BL-1D - Data Logger for barometric pressure, humidity temperature and dew point

    Barometric pressure, humidity temperature and dew point data logger. Compact, dependable and inexpensive. Learn More
  3. HC2A-S - Humidity Probe

    HC2A-S - Humidity Probe

    The HC2-S / HC2-S3 is the most versatile probe from ROTRONIC and forms the basis of the product portfolio. It measures humidy and temperature and calculates the dew/frost point. Learn More
  4. HC2A-S3 - Standard meteo probe

    HC2A-S3 - Standard meteo probe

    The HC2A-S / HC2A-S3 is the most versatile probe from ROTRONIC and forms the basis of the product portfolio. It measures humidity and temperature and calculates the dew/frost point.

    Learn More
  5. HygroFlex3 - HF3 (R-Type)

    HygroFlex3 - HF3 - HVAC transmitter

    R-Type / S-Type
    Measures relative humidity and temperature and calculates the dew/frost point in offices and rooms where good looks play a role.

    W-Type / D-Type
    Measures relative humidity and temperature and calculates the dew/frost point in HVAC applications focused on relability and repeatability.

    Learn More
  6. HygroFlex5 - HF5 - CH

    HygroFlex5 - HF5 - HVAC TRANSMITTER

    The HygroFlex5-series is the latest development in transmitters for humidity, temperature and dew point. One outstanding feature of this innovative product is the possibility to output any psychrometric calculation as an analogue signal. Learn More
  7. HygroFlex5 - HF5 - CH

    HygroFlex5-EX - HF5-EX - two-channel transmitter

    The new HygroFlex5-EX series is the latest development in two-channel transmitters for the exact measurement of humidity and temperature in explosive atmospheres. This device conforms to the latest international standards. Learn More
  8. HygroFlex8 - HF8 - CH

    HygroFlex8 - HF8 - transmitter

    Measures relative humidity, temperature and all calculated (psychrometric) parameters in the fields of HVAC, industry and pharmaceuticals. Learn More
  9. HygroGen2 - CH

    HygroGen2 - HG2-S - Humidity Generator

    Portable humidity and temperature generator to calibrate humidity and temperature measuring instruments (multi-point calibration) Learn More
  10. HygroGen2 - CH

    HygroGen2 - HG2-XL - Humidity Calibrator

    Humidity and temperature generator to calibrate humidity and temperature measuring instruments (multi-point calibration) Learn More
  11. HygroLog HL-NT2 (with display)
  12. HygroLog HL-1D - CH

    HygroLog HL-1D - INEXPENSIVE DATA LOGGER

    Humidity and temperature data logger. Compact, dependable and inexpensive. Learn More
  13. HygroLog HL-20 (with display)

    HygroLog HL-20 - ECONOMICAL DATA LOGGER

    The compact data logger for humidity and temperature measurement offers high precision and reliability at a reasonable price. The HL-20 series is easy to use and deployable in a wide range of applications. Thanks to its integrated batteries, the HL-20 works completely independently and offers its users maximum flexibility. Learn More
  14. HygroPalm - HP23-A

    HygroPalm - HP23-A - multi-function hand-held indicator

    The HygroPalm23-A is the high-end product in our range of handheld instruments. Apart from measuring humidity and temperature, it also calculates all psychrometric parameters and offers various additional functions. The measurement results can be recorded continuously and these separated simply using the batch function. All ROTRONIC transmitters in the Airchip 3000 series can be adjusted with the HP23-A via a service cable. Learn More