This sensor measures water vapour content relative to the ambient temperature and is useful for environmental and Biology studies. For example, a simple transpiration experiment can be set up and the results analysed in less than 5 minutes.


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Empowering educators worldwide, from schools and libraries to renowned institutes.

The future of education is here, and it fits right in the palm of your hand. Give your students the gift of engaging, interactive, and collaborative learning experiences with our SmartSchool Systems Microscope solutions. 

Activities and Curriculum:


  • Water vapour expelled through the skin and breath*
  • Transpiration of plants*

Environmental Science:

  • Weather studies
  • Determining dew point*

Range: 0 – 100% RH

Resolution: 0.1%

Accuracy: ±2.5%RH at 55%RH, ±5%RH between 10 and 95%RH

This sensor is designed for monitoring relative humidity.

The slots in the end cap allow for circulation of air to maximize response times.

Works with the following Dataloggers:

VHub4 and VHub8



  • 0 to 100%RH (Resolution 0.1%RH)​