Hygrometer
device · 1450 · Early modern era
Measures air humidity.
What it is made of
- Human hair strand — has part. The length changes with humidity.
- Gauge needle and dial — has part. It shows the humidity.
- Spring — has part. The tension of the hair.
Principles and materials it uses
- Wood — is made of. Early hygrometers were a wooden frame with a sensitive fibre or hair.
- Plant fibre — is made of. Humidity was shown by a fibre that changed length.
Where it is used
- Weather station — is part of. A hygrometer.
What it is a kind of
- Sensor — is a kind of. A humidity sensor.