Question

which device has liquid in glass components? hygrometer celiometer radar thermometer

Explanation:

A thermometer typically has a glass tube with liquid (such as mercury or alcohol) inside. As the temperature changes, the liquid expands or contracts. A hygrometer measures humidity and doesn't have liquid in glass components in the same sense. A celiometer is used for measuring cloud heights and doesn't have this feature. Radar is based on electromagnetic waves and has no liquid - in - glass parts.

Answer:

thermometer