Humidity and Temperature Meter Series HMT330

Note that the HMT330 series is being discontinued. It is replaced by Indigo family products. Do not specify HMT330 for new projects, instead view Indigo transmitters and probes that are also designed for use in demanding applications.

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.

Keen on our HMT330 series? You are going to love Vaisala Indigo.

Interchangeable smart probes, robust transmitters, and Vaisala Insight software create a strong ecosystem to ensure energy efficiency, safety, and end-product quality in your operations. The modular plug-and-play design makes Indigo family probes and transmitters easy to install, use, and maintain.

The equivalents for the HMT330 series

HMT331 for wall mounting is now HMP1 probe + INDIGO500 transmitter

HMT333 for duct mounting and tight spaces is now HMP3 and HMP9 probes + INDIGO500 transmitter

HMT334 for high pressures up to 100 bar and vacuum conditions is now HMP4 + INDIGO500 transmitter

HMT335 for high temperatures is now HMP5 + INDIGO500 transmitter

HMT337 for high humidity and meteorological applications is now HMP7 + INDIGO500 transmitter

HMT338 for pressurized pipelines up to 40 bar is now HMP8 + INDIGO500 transmitter

Vaisala HMT330 vs Indigo ecosystem - what to choose and why?

In this 40-minute webinar, you will learn about key differences between the new Indigo transmitters and smart probes and the traditional HMT330 transmitters.

Watch Webinar


Indigo ecosystem features

The new Indigo platform is built on the same measurement technology as its predecessor, the HMT330 series. The most significant and widely desired feature of the Indigo platform is the interchangeability of the smart probes. Many functionalities that were traditionally located inside the transmitter are now built into the smart probe instead, allowing for field swapping and cross-functional configurations.

Comprehensive range of measurement parameters

  • humidity and temperature
  • dew point
  • moisture in oil
  • carbon dioxide (CO2)
  • vaporized hydrogen peroxide (H2O2)
  • barometric pressure

Webinar: How to maintain world-class measurement performance

What are the key success factors for maintaining world-class measurement performance for your instruments? Watch now our free on-demand webinar to find out

  • What is the best way to ensure measurement quality?
  • How does measurement quality affect my operations? 
  • How can I maintain instrument accuracy in demanding applications?
  • What features help in maintaining excellent performance in high-quality measurement instruments?
  • How can innovations in the latest generation of instruments make maintenance easier? Learn more about the Vaisala Indigo520 Transmitter