The same as they've always done, they measure temperatures.
thermometers today are used to generally see what the temperature in a room is they mainly use mercury to find this out :)
Thermometers today are typically made of glass, plastic, or metal. They contain a temperature-sensitive element, such as mercury or alcohol, that expands or contracts with temperature changes, causing the level to rise or fall in the measuring column. Digital thermometers are also common, using electronic sensors to measure temperature.
Mercury thermometers are still used in some industrial applications and laboratories due to their accuracy and ability to measure high temperatures. However, their use is declining due to the potential health and environmental risks associated with mercury exposure. In many situations, digital thermometers or other types of non-mercury thermometers are used instead.
Most modern thermometers no longer use mercury due to its toxicity. Instead, digital thermometers, infrared thermometers, and other types of thermometer technology that do not contain mercury are widely available and recommended for safer use.
Mercury used to be a popular element for thermometers, but I think it's illegal to make a mercury thermometer because if you break one you have a hazardous situation on your hands. Today thermometers that contain liquid, almost always contain alcohol.
There are 34 different types of thermometer that range from alcohol thermometers and ear thermometers to medical thermometers and electrical resistance thermometers.
Alcohol is most common in modern thermometers. Early thermometers used mercury, but these pose a possible health threat. Today, both are being replaced by electronic instruments.
Mecury thermometers
The three main types of thermometers are liquid-in-glass thermometers, digital thermometers, and infrared thermometers. Liquid-in-glass thermometers use a liquid like mercury or alcohol to measure temperature, digital thermometers provide a numeric temperature reading, and infrared thermometers measure temperature from a distance using infrared technology.
No, mercury is not present in all types of thermometers. While mercury thermometers are common, other types such as digital thermometers and infrared thermometers do not contain mercury. Mercury thermometers are being phased out due to environmental concerns.
A thermometer is used to measure temperature. There are various types of thermometers such as digital thermometers, mercury thermometers, infrared thermometers, and thermocouples.
A thermometer is used to measure the temperature of a body. There are various types of thermometers, such as digital thermometers, infrared thermometers, and mercury thermometers.