thermometrograph
/ˌθɜrməˈmɛtrəˌɡræf/
noun
- An instrument that automatically records temperature over time.
- A thermometrograph produces a graph showing how hot or cold it was each hour.
- The weather station used a thermometrograph to track temperature changes throughout the day.
- The old thermometrograph in the lab had a rotating drum and a pen that moved with the temperature.