Thermograph

thermograph
Description

Thermographs record temperature over time. Most use a small pen to mark the current temperature. A cylindrical drum with paper turns beneath the pen as time passes. The result is a graph of temperature over the course of a day or more.

While they are not navigational aids, thermographs are important scientific instruments for measuring and predicting the weather, which has obvious implications for sea and air travel.

Related Instruments

HygrographThermometerBarometer

Video

More

  • Older home thermostats measure the temperature in a way very similar to the way the thermograph does. You can read more about how home thermostats at Indiana Public Media.
  • Wikipedia's page the on Thermo-hygrograph.