What liquids can be used in a glass stem thermometer?
Usually, mercury and petrolate are the most common fluids in this kind of thermometer. Mercury and petrolate usually can measure temperature in a range of −40 to +900°C and −200 to +260°C, respectively [2].
How do you use a liquid thermometer?
A thermometer is usually made up of a small, hollow glass tube. At the bottom of the tube is a bulb, which holds a liquid such as alcohol or mercury. When there is an increase in heat, the liquid inside the bulb expands, pushing up into the tube. A decrease in heat lets the liquid contract, moving down the tube.
How do you read liquid in a glass thermometer?
Liquid-in-glass thermometers are based on the principle of thermal expansion of substances. A liquid in a glass tube (called a capillary) expands when heated and contracts when cooled. A calibrated scale can then be used to read off the respective temperature that led to the corresponding thermal expansion.Mar 5, 2019
What is range of thermometer?
The range of a thermometer is the difference between the maximum and minimum temperatures that the thermometer can read. A common range for liquid-in-glass thermometers is from –10°C to 110°C.
What is in a glass thermometer?
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.Mar 30, 2021
What liquid is in a glass thermometer?
mercury
Where is liquid-in-glass thermometer used?
Liquid-in-glass thermometers are mainly employed in the Navy and Marine Corps in different configurations. They are also applied in meteorological and oceanographic applications, where they are generally calibrated by graduations eternally engraved into the glass.
Which liquid is not used in liquid-in-glass thermometer?
Water is not able to be used as a thermometer liquid because of its higher freezing point and lower boiling point than the other liquids in general.
Is the liquid in a thermometer dangerous?
The small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. The mercury will evaporate and can contaminate the surrounding air and become toxic to humans and wildlife. Each thermometer contains about . 5-1.5 grams of mercury.
Is the red stuff in thermometer poisonous?
The Bottom Line A broken mercury-containing thermometer can be toxic if the vapors are inhaled. The risk of poisoning from touching or swallowing mercury from a broken thermometer is low if appropriate clean-up measures are taken.