Alcohol Thermometer - Alcohol Thermometer

Japanese: アルコール温度計 - アルコールオンドケイ
Alcohol Thermometer - Alcohol Thermometer

Alcohol thermometers usually use kerosene (light oil) (alcohol was used in the past). Kerosene is transparent, so it is colored red or blue. Since the liquid tends to adhere to the inside of the glass, it is not suitable for precise temperature measurement. Commercially available thermometers usually have a range of -100 to +100°C. Those that use isopentane instead of kerosene can measure down to -160°C. Some thermometers use a mixture of pentane as the main component and can measure down to -200°C.

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

Japanese:

普通,アルコール温度計といわれているものは,ケロシン(灯油)を用いている(昔はアルコールが使用されていた).ケロシンは透明なので赤色あるいは青色に着色されている.液がガラス内面に多少付着するので精密な温度測定には適さない.通常,市販されているものは-100~+100 ℃ の範囲内である.ケロシンのかわりにイソペンタンを用いたものでは-160 ℃ まで測定できる.ペンタンを主とした混合液では-200 ℃ まで測定できるものもある.

出典 森北出版「化学辞典(第2版)」化学辞典 第2版について 情報

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