Dpstar have been the industry leader in humidity measurement for over 30 years and is able to create solutions even for very demanding measurement conditions. Our purpose is to help companies around the world benefit from energy savings, comply with industry standards, reduce damage to equipment and ensure the safety of their staff, customers and processes. Dpstar provides reliable instruments for productivity, energy efficiency, resource use, and quality. Our products provide them with accurate and reliable measurement data which enables them to make decisions for optimized industrial processes.

What Is Humidity?

Humidity is the amount of water vapor present in the atmosphere or a confined space. A higher level of humidity indicates a greater level of water vapor. A high humidity level results in a higher dew point temperature. This means that condensation will occur even at high temperatures if the humidity level is high enough. There are four main measurements of humidity: absolute, relative, dew point temperature and specific.

Absolute Humidity

Absolute humidity (units are grams of water vapour per cubic meter volume of air) is a measure of the actual amount of water vapour in the air, regardless of the air’s temperature. The higher the amount of water vapour, the higher the absolute humidity. For example, a maximum of about 30 grams of water vapour can exist in a cubic meter volume of air with a temperature in the region of 30°C.

Relative Humidity

Relative humidity expressed as a percent, is a measure of the amount of water vapour that air is holding compared to the amount it can hold at a specific temperature. Warm air can possess more water vapour (moisture) than cold air, so with the same amount of absolute/specific humidity, air will have a higher relative humidity. A relative humidity of 50% means the air on that day (specific temperature) holds 50% of water needed for the air to be saturated. Saturated air has a relative humidity of 100%.

Dew Point Temperature

Dew point temperature is a useful parameter in many industrial humidity applications. It is often used to measure dryness in applications such as plastics and compressed-air drying, where the relative humidity is typically below 10%RH. It is an industrial de facto to call these types of low humidity instruments as dew point meters.

Specific Humidity

Specific humidity refers to the weight of water vapour contained in a unit weight (or amount) of air (expressed as grams of water vapour per kilogram of air). Absolute and specific humidity are quite similar in concept.

HUMICAP’s Unique Benefits

Excellent Long-Term Stability

Insensitive To Dust & Most Chemicals

Full Recovery From Condensation

Chemical Purge Option For Stable Measurements 

Sensor Heating For Measurements In Condensing Environments

Why Choose Dpstar

The Perfect Solution For Every Measurement

Humidity sensors and humidity transmitters must meet different requirements, depending on the application and industry. Dpstar offers an extensive portfolio of measuring devices for a variety of starting points and environmental conditions.

Calibration Laboratory For Maximum Accuracy

Vaisala operates an in-house, accredited calibration laboratory. The company’s in-depth knowledge and ongoing development in the field of humidity calibration are reflected in the high precision of humidity sensors.

Proven Quality & Reliability

Thanks to many years of experience in sensor production and thin-film technology, humidity sensors from Vaisala now represent the highest quality and reliability. With the reliable data from our instruments, customers can increase process efficiency, product quality, productivity, and yield but decrease energy consumption, waste, and emissions.

Customer Specific Solutions

With our continuous research and development efforts, we have been able to combine humidity measurement possibilities also with other parameters and technologies. This enables us to maintain the highest quality standards and implement customer-specific solutions quickly.

Our Products Solutions

Vaisala has a wide selection of humidity measurement instruments that are optimized for different types of applications. Vaisala’s HUMICAP® technologies have been trusted for decades due to their accuracy and stability. HUMICAP® technologies include capacitive thin-film polymer sensors. The polymer’s dielectric constant has been linearized with humidity variations to guarantee an unbeatable accuracy level up to 1 % RH (aw 0.01).

Humidity Calculator

Using your computer or mobile device is an easy and convenient way to make humidity calculations and conversions. The free Vaisala Humidity Calculator lets you calculate several humidity parameters from one known value. You can also do unit conversions and see the effects of changing ambient conditions – like temperature and pressure – on humidity parameters. Use the tool online, or bookmark it for offline use. The same tool is optimized also for mobile devices.

Learn More

Humidity Applications


Control humidity in paint booths and pressure and humidity in engine testing.


Solutions for semiconductor process, facility monitoring & control.


Control the output humidity to optimize energy usage.

HVAC Measurement

for well-being and energy efficiency.

Life science

Measurements in pharmaceutical, biotechnology & GxP-regulated environments.

Compressed Air

Avoid over-drying the air by measuring dew point.

Get In Touch With Our Experts Today!

Dpstar Group
No 35, Jalan OP ½, Pusat Perdagangan One Puchong,
Off Jalan Puchong, 47160 Puchong,
Selangor Darul Ehsan, Malaysia.
Email: [email protected]

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