Datasheet Contact Us Buy now Humidity and Temperature Meter Series HMT330 for demanding humidity measurement Measure humidity in harsh environments with the instrument you can depend on. The Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT330 is designed for demanding industrial applications where stable measurements and extensive customization are essential. Looking for HMT330 performance with interchangeable probes and a transmitter supporting two probes? View Indigo family. To learn more about the differences between HMT330 and the Indigo platform, view this comparison sheet for details. There are six models to choose from: HMT331 for wall mounting, see also HMP3 and HMP9 HMT334 for high pressures up to 100 bar and vacuum conditions, see also HMP4 HMT335 for high temperatures, see also HMP5 HMT337 for high humidity and meteorological applications, see also HMP7 HMT338 for pressurized pipelines up to 40 bar, see also HMP8 The instrument can be quickly tailored to meet the specific needs of each individual application and is pre-configured for each delivery. Features Full 0 … 100 %RH measurement, temperature range up to +180 °C (+356 °F) depending on model Pressure tolerance up to 100 bar depending on model Excellent performance in harsh conditions; good chemical tolerance Corrosion-resistant IP65/IP66 housing Traceable calibration for measurement and analog outputs (certificates included) RS232/485/422 Optional graphical display and keypad for convenient operation + Show more Key Benefits Reliable and stable Accurate and stable measurement even in demanding conditions gives reliable data. The construction of the transmitter is suitable for the heavy duty in industrial applications. Configurable and ready for installation The product is assembled and configured to your needs, delivered within days to your facility, and fully ready for installation. The user interface is multilingual and available in English, German, French, Japanese and Chinese. Watch the video Learn how to replace the HMT330 transmitter with Indigo520 Downloads Datasheet (2.66 MB) HMT330 Series Humidity and Temperature Transmitters Download the Datasheet Datasheet: Vaisala HUMICAP® Humidity Sensors (286.61 KB) Datasheet: HMT330 Series Humidity and Temperature Transmitters (2.66 MB) Manual: HMT330 User's Guide (3.96 MB) Manual: POWER-1 Installation Guide (388.27 KB) Manual: HMT330/DMT340/MMT330/PTU300 Multilingual Quick Guide (EN, DE, FR, JA, ZH) (1.44 MB) Manual: HMT330WPA Installation Instructions (496.46 KB) Order Form: HMT330 Order Form Global (539.54 KB) Application Note: How to Choose the Right Instrument for Measuring Humidity and Dew Point (565.13 KB) All downloads Product Resources Download Humidity eGuide for Smart Industries Read more Smart measurements for smart industries – humidity measurement in industrial applications Read more Humidity calculator Read more One-point in-situ calibration – the fast, easy option Read more Saturated salt calibration with the Vaisala HMK15 – another easy option Read more Customer Stories Customer case Optimized drying process helps Isolava cut energy consumption and improve end-product quality Isolava, founded in 1963 and part of Knauf group since 1990, manufactures gypsum plaster blocks for the construction industry. The most energy... Read more Customer case Creating the right climate Vaisala humidity transmitters help to preserve the royal warship Vasa Saving the famous 17th century Swedish warship, Vasa, from further... Read more Customer case Mona Lisa preserved by Vaisala By Jean-Francois Bore, Application Sales Engineer, Vaisala "I am sure you know of the Mona Lisa, known as La Joconde in French, one of the most... Read more Customer case Optimal timber drying conditions at the Korkeakoski Sawmill Vaisala’s humidity and temperature measurement probes help the sawmill to minimize the drying time for timber goods. The UPM-Kymmene Korkeakoski... Read more Customer case Accurate monitoring of plastic drying process In plastic production plants, dew point measurement is essential for monitoring the drying process. Tessy Plastics Corporation’s state-of-the... Read more Customer case Caldwell Energy relies on Vaisala HMT333 Humidity and Temperature Transmitters for turbine inlet air cooling systems “Vaisala’s are built for the industrial environment. We’ve had no failures in six years.” Mark Ammons, Project Engineer, Caldwell Energy Power... Read more Customer case +20% Increase in production capacity with zero increase in energy consumption - dairy manufacturer Valio updated dryer controls Dairy manufacturer Valio updated dryer controls Valio, solely owned by the Finnish dairy farmers, is the largest dairy company in Finland. The... Read more Customer case Saving energy in ceramics drying “Vaisala relative humidity transmitters have become standard within the Wienerberger Group.” Steven Debels, Plant Manager, Koramic Pottelberg... Read more Customer case China's world-famous Taizhou Bridge uses HMT330 Humidity Transmitters to extend service life “We chose Vaisala HMT330 to monitor temperature and humidity conditions in the bridge’s main-cable dehumidification system because we pay... Read more Customer case Challenge of measuring inlet humidity on combustion turbines The Cinergy Madison Generating station, located north of Cincinnati, Ohio, came into commercial operation in July 2000. The plant has eight GE... Read more Customer case 21st century 4-stroke engine based power plants rely on Vaisala humidity measurement Power plant emissions (especially nitrogen oxides) can be controlled by monitoring the humidity content of the engine charge air. An accurate... Read more Customer case Setting the standard in tissue engineering Tissue engineering offers the promise of off-the-shelf products containing living human cells. Organogenesis Inc. has turned this science... Read more Services Standard calibration Accredited calibration Custom calibration Repair service Calibration Care Agreement Need support? Three ways to calibrate your HMT330 Sign up for news Contact us
Customer case Optimized drying process helps Isolava cut energy consumption and improve end-product quality Isolava, founded in 1963 and part of Knauf group since 1990, manufactures gypsum plaster blocks for the construction industry. The most energy... Read more
Customer case Creating the right climate Vaisala humidity transmitters help to preserve the royal warship Vasa Saving the famous 17th century Swedish warship, Vasa, from further... Read more
Customer case Mona Lisa preserved by Vaisala By Jean-Francois Bore, Application Sales Engineer, Vaisala "I am sure you know of the Mona Lisa, known as La Joconde in French, one of the most... Read more
Customer case Optimal timber drying conditions at the Korkeakoski Sawmill Vaisala’s humidity and temperature measurement probes help the sawmill to minimize the drying time for timber goods. The UPM-Kymmene Korkeakoski... Read more
Customer case Accurate monitoring of plastic drying process In plastic production plants, dew point measurement is essential for monitoring the drying process. Tessy Plastics Corporation’s state-of-the... Read more
Customer case Caldwell Energy relies on Vaisala HMT333 Humidity and Temperature Transmitters for turbine inlet air cooling systems “Vaisala’s are built for the industrial environment. We’ve had no failures in six years.” Mark Ammons, Project Engineer, Caldwell Energy Power... Read more
Customer case +20% Increase in production capacity with zero increase in energy consumption - dairy manufacturer Valio updated dryer controls Dairy manufacturer Valio updated dryer controls Valio, solely owned by the Finnish dairy farmers, is the largest dairy company in Finland. The... Read more
Customer case Saving energy in ceramics drying “Vaisala relative humidity transmitters have become standard within the Wienerberger Group.” Steven Debels, Plant Manager, Koramic Pottelberg... Read more
Customer case China's world-famous Taizhou Bridge uses HMT330 Humidity Transmitters to extend service life “We chose Vaisala HMT330 to monitor temperature and humidity conditions in the bridge’s main-cable dehumidification system because we pay... Read more
Customer case Challenge of measuring inlet humidity on combustion turbines The Cinergy Madison Generating station, located north of Cincinnati, Ohio, came into commercial operation in July 2000. The plant has eight GE... Read more
Customer case 21st century 4-stroke engine based power plants rely on Vaisala humidity measurement Power plant emissions (especially nitrogen oxides) can be controlled by monitoring the humidity content of the engine charge air. An accurate... Read more
Customer case Setting the standard in tissue engineering Tissue engineering offers the promise of off-the-shelf products containing living human cells. Organogenesis Inc. has turned this science... Read more
