Bimetal thermometer

Japanese: バイメタル温度計 - バイメタルおんどけい(英語表記)bimetal thermometer
Bimetal thermometer
A thermometer that takes advantage of the property of a bimetal to bend toward a metal with a smaller coefficient of expansion when heated. The bimetal used is often a combination of brass and invar (nickel steel with 36% nickel), and the thermometer's scale range is usually between -20 and 150°C, but there are also ones for high temperatures. Examples include meteorological thermometers in which one end of a plate-shaped bimetal is fixed and the movement of the other end is magnified and recorded with a lever, and industrial thermometers in which a spiral or helical bimetal is housed in a protective tube. They are also used for automatic temperature control in household electrical appliances.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
バイメタルが熱せられたとき,膨張係数の小さい金属の側へ湾曲する性質を利用した温度計。使用するバイメタルは,黄銅とアンバー (ニッケル 36%のニッケル鋼) の組合せが多く,普通,温度計の目盛り範囲は-20~150℃以内であるが,高温用のものもある。板状バイメタルの一端を固定し,他端の動きをてこで拡大して記録させる気象用自記温度計や,保護管に渦巻形,弦巻形のバイメタルを収めた工業用温度計などがある。また,家庭用電気器具などで自動温度調節に用いられている。

出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報

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