Explore the science behind thermometers, from liquid expansion to digital sensors and infrared technology. Learn how these devices detect heat and provide accurate temperature readings.

Liquids expand more than solids This is the principle behind liquid-in-glass thermometers. An increase in temperature results in the expansion of the liquid which means it rises up the glass.

Article Open access Published: 16 October 2012 Molecular reorientation of a nematic liquid crystal by thermal expansion Young-Ki Kim, Bohdan Senyuk & Oleg D. Lavrentovich Nature Communications 3 ...

SAFE OPERATION Where cold refrigerant liquid lines are used, it is necessary that certain precautions be taken to avoid damage that could result from liquid expansion. Temperature increase in a piping ...

Sunday Times News: Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion.

Thermal Expansion of Solids, Liquids and Gases The change in temperature of a body causes expansion or contraction of that body. Most of the substances expand on heating and contract on cooling.