elavhõbedasammast

Elavhõbedasambast, also known as mercury column or mercury thermometer, refers to a type of thermometer that uses mercury to measure temperature. This device typically consists of a glass tube with a vacuum at the top and a bulb at the bottom containing a small amount of mercury. As the temperature changes, the mercury within the bulb expands or contracts, causing the mercury column to rise or fall within the calibrated glass tube. The markings on the tube indicate the corresponding temperature.

Historically, mercury thermometers were widely used in scientific research, medical settings, and households due to their accuracy and reliability within a certain temperature range. The expansion of mercury is relatively linear with temperature, making it suitable for precise measurements. However, concerns regarding the toxicity of mercury have led to a decline in their use, with many regions and institutions phasing out mercury-containing devices in favor of digital or alcohol-based alternatives. Proper disposal of broken mercury thermometers is crucial to prevent environmental contamination.