Measurement
Humidity
Relative and absolute humidity for environmental control, pharmaceutical processes, HVAC and industrial facilities. Spot or continuous measurement.
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Water (H2O) can present itself in three different forms: solid (ice), liquid (water), and gas (humidity). Humidity is an invisible gas that can be measured and defined with different parameters. Relative humidity indicates the present state relative to maximum humidity in a given temperature. Dew point temperature indicates the temperature to which air needs to be cooled in order to reach condensation. For industrial-scale manufacturing, controlling these parameters is a must for good quality end-products and efficient manufacturing processes.
Get to know Vaisala’s reliable and durable measurement solutions for humidity and moisture.
Humidity
Humidity is measured in many air control applications, where the relative humidity is for the most part over 10 %. Relative humidity (RH) is a measure of the water vapor content of air. For more information, read the article what relative humidity is and why it is important.
Find humidity measurement products by typical applications:
test chambers, building automation and HVAC, spray drying, paint booths, biogas production, and bio-decontamination.
Moisture
Avoiding moisture in concrete or structures requires high quality measurement. Moisture measurements are essential also when there is a need to protect engines or to ensure high-quality oil with moisture in oil measurements
Humidity control in hazardous locations
Humidity control is critical in many spaces where flammable or explosive materials such as fuels, chemicals, explosives are being stored. These spaces are designated as hazardous due to potentially explosive atmospheres. They require specially designed and approved instruments for safe operation.
Vaisala's intrinsically safe humidity instrument for hazardous locations is the HMT370EX Humidity and Temperature Transmitter.
High-quality measurement benefits
Energy-savings
Especially in drying applications, accurate humidity measurement can bring significant savings in both energy and costs. By knowing the humidity level you can, for example, avoid over-drying and heating the air too much.
End-product quality
Exact humidity data helps you optimize your production process and facilities, as well as make sure that the humidity level in your end-products is just right. Depending on the product, it can mean for example longer shelf life or improved stability.
Safety & well-being
Humidity control in facilities and moisture control in structures improve both safety and well-being when the air is optimized for breathing and the formation of mold is avoided. Controlling process humidity is also crucial for safety and well-being.
Vaisala humidity calculator
Relative humidity, absolute humidity, wet-bulb temperature, enthalpy, water concentration, and many more. Humidity calculations and conversions made easy.
Trusted HUMICAP® and DRYCAP® technologies
We have been the industry leader in humidity measurements for over 40 years. Our solutions are suitable also for very demanding measurement conditions. Vaisala’s HUMICAP® and DRYCAP® technologies have been trusted for decades due to their accuracy and stability.
Humidity and Multigas Measurements with CARBOCAP® and PEROXCAP®
With our continuous research and development efforts, we have been able to combine humidity measurement possibilities also with other parameters and technologies. We developed the CARBOCAP® technology originally for measuring CO2, but the technology is well suited also for optical humidity and methane measurements in biogas applications. Vaisala’s PEROXCAP® technology was developed for measuring humidity, vaporized hydrogen peroxide and temperature for easy validation of hydrogen peroxide bio-decontamination of isolators and facilities.
HUMICAP Humidity and Temperature Probe HMP155
Vaisala’s HUMICAP® Humidity and Temperature Probe HMP155 delivers accuracy and reliability under even the most challenging conditions including tropical, coastal, and marine environments.
The HMP155 is engineered to deliver precise data in high humidity climates where moisture is near saturation, in environments with changing temperatures, and in harsh environments where measurements may be corrupted by chemicals, fog, mist, rain, and heavy dew.
Instruments (2)
HMP80 HUMICAP® handheld probe for humidity and temperature
For spot-checking and calibrating humidity and temperature measurements
Notes and publications
Humidity in Pharmaceutical and Life Science Cleanrooms
Why regulators require continuous humidity and temperature logging in cleanrooms, and how HUMICAP® technology withstands hydrogen peroxide…
Vaporized Hydrogen Peroxide (VHP) Bio-Decontamination
The four phases of the bio-decontamination cycle, why relative humidity stops being reliable with VHP, and what PEROXCAP® technology solves.
Dew Point in Data Centers
The ranges ASHRAE recommends, why dew point is a better control parameter than relative humidity, and how sensor accuracy impacts energy consumption.
Dew Point in Industrial Drying
Why industrial drying seeks the right balance between quality and energy consumption, and why HUMICAP® and DRYCAP® cover different humidity ranges…
Humidity in Climatic and Test Chambers
Why sealing materials and samples under test skew the humidity reading, and how chemical purge and warmed probes solve the condensation risk.
Humidity in Warehouse Monitoring
What a warehouse without humidity control risks, what variables determine risk inside the storage facility, and why continuous monitoring with remote…
A question about your measurement
A specialist replies with the solution, the instrument and the service that fit.