humidity sensor
A less widely used sensor that nevertheless shows interesting results when monitoring environments over time. Place one in a polythene bag with your hand, or a plant and see how the humidity changes. The range of the sensor varies between manufacturer, and it is within the range 10-90% humidity. Acetone and organic solvent vapours are harmful to the sensor while wetting with water leads to unreliable readings.
Possible uses:
- rate of transpiration and humidity
- moisture in exhaled air
- hygrometry
- weather station
- moisture from burning fuels
- moisture uptake through fabrics
I’ve rated these sensors but your assessment will be different. I give a score, out of five, for the sensor’s intrigue, interest, and learning potential. I also give a score for how often a science department might use it.