elohopealämpömittarit

Elohopealämpömittarit are a type of thermometer that uses mercury to measure temperature. The principle behind their operation is the thermal expansion of mercury. When the temperature rises, the mercury within the sealed glass tube expands and moves up the calibrated scale. Conversely, when the temperature falls, the mercury contracts and recedes down the scale. These thermometers typically consist of a glass bulb containing the mercury and a slender glass stem with markings indicating temperature in degrees Celsius or Fahrenheit. The bulb is designed to be immersed in or placed in contact with the object or environment whose temperature is being measured. Due to the toxicity of mercury, the use of mercury thermometers has been significantly restricted in many parts of the world, and they have largely been replaced by digital or alcohol-based thermometers, especially in consumer applications and healthcare settings. However, they were once a common and reliable tool for temperature measurement in various scientific, industrial, and domestic contexts due to mercury's predictable expansion properties and high boiling point.