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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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)​