最さい低てい温おん度ど計けい

Meanings

1

minimum thermometer

A thermometer that records the lowest temperature reached over a period, used in meteorology and cold-chain monitoring.

気き象しょう観かん測そくでは、最さい低てい温おん度ど計けいを使つかってその日ひの最さい低てい気き温おんを記き録ろくします。
In meteorological observation, a minimum thermometer is used to record the day's lowest temperature.