Relative Humidity Products

Industrial relative humidity products designed by experts in humidity measurement and calibration







We've put our expert knowledge in humidity measurement and calibration into the development of our wide range of RH probes and transmitters, designed to meet the requirements of demanding industrial applications. As the largest dew-point transmitter manufacturer in Europe, and the operator of several high-capacity calibration laboratories across the globe, we have the experience to design and manufacture accurate, reliable and durable humidity probes and transmitters.

We're so confident in our relative humidity technology that we use it to control chamber conditions in our popular line of humidity calibrators.

Customised products with worldwide service and application support

If our standard products don’t quite meet your requirements, our team of process engineers and systems designers can work with you to take your project from the design and consultation phase, right through to manufacturing and commissioning. Our 10 global sales and service centers in Americas, Europe, Middle East and Asia and our worldwide distributor network are always on hand to provide support for your challenging applications. Click here to get in touch today.

HygroSmart Interchangeable Humidity Sensor modules for easy maintenance

Michell’s interchangeable sensors combine the latest sensing element and hybrid electronics to form a humidity sensor module which holds its own calibration data. To maintain traceability, the user can simply swap out an old module with a freshly calibrated one.

The orange HygroSmart symbol identifies products using the latest generation HygroSmart HS3 interchangeable humidity sensor.

The blue HygroSmart symbol identifies products using the I7000XP interchangeable humidity sensor.

PST logo
We are part of Process Sensing Technologies and all our products now live on our new website, The links below take you to the new product pages - don't forget to update your bookmarks and favorites!

Relative Humidity Sensors / Humidity Probes

Duct Mount Humidity Transmitters / Humidity Meters

Wall Mount Humidity Transmitters / Humidity Meters

OEM Transmitters

HygroSmart Interchangeable Humidity Sensor

Humidity Sensor Elements

MDM25 Hand-Held Hygrometer

Humidity control in HVAC applications is important to maintain air quality, and human comfort. Excess humidity can promote bacteria growth, and lead to structural damage.

  • Building management systems
  • Air handlers
  • Swimming pool dehumidifiers
  • Sauna monitoring
  • Indoor and outdoor installations

Humidity and temperature control is critical through all stages of pharmaceutical production, from research and development, to manufacturing and storage.

  • Tablet coaters
  • Drying machines
  • Drug research and development
  • Material and product storage
  • Production environment control

Accurate measurement of relative humidity is important for predicting weather patterns and monitoring climate change. We have a range of IP/NEMA rated sensors suitable for outside installation.

Our relative humidity probes and transmitters can be supplied with radiation shields for mounting on the outside of buildings, or at weather stations in remote locations across the globe.

Relative humidity and temperature monitoring and control are vital considerations in almost any type of controlled environment.

  • Glovebox monitoring
  • Clean rooms
  • Fume cupboards
  • Climatic chambers
  • Salt spray chambers

Relative humidity and temperature are important in many aspects of agriculture, from plant growth and animal comfort to curing, storage and transport of foodstuffs.

  • Fruit and vegetable storage
  • Greenhouses and grow rooms
  • Animal comfort for livestock
  • Product curing and smoking
  • Environmental monitoring during transportation

The applications for our humidity products are not limited to what's listed on this page. We have over 40 years expertise measuring humidity, and performing calibrations and can help you choose the best product for your application.

Please get in touch with our team of experienced engineers, and we can help you find a solution to your humidity problems.