Generally, laboratory thermometers are essential tools in monitoring experiments, evaluating test materials, calibrating instruments, and other scientific procedures.
Many researchers use them to ascertain freezing and boiling points. Since they may be utilized for different kinds of solvents, the range is -10 degrees Celsius to 110 degrees Celsius. Though most are made up of glass, some thermometers’ material are metals which are reinforced via annealing or thermal tempering.
The following are the common types of laboratory thermometers:
Liquid-in-glass thermometer
It is made up of sealed glass containing red alcohol or mercury which rises as the temperature increases.
Bimetallic Strip thermometer
As compared to glass-stem thermometers, bimetallic strip thermometers are generally more affordable and easy to use. However, they may be less accurate as they do not contain liquids that expand to highly accurate units. A bimetallic strip thermometer is composed of two distinct kinds of metals which are attached together. The differences of their consistencies make the metals expand at particular lengths and rates. This then causes the bimetallic strip to bend towards the thermal expansion with a lower coefficient which deflects a pointer over a regulated temperature scale.
Infrared thermometer
It translates infrared energy into an electrical signal which can be read as a temperature scale in Fahrenheit or Celsius.
Electronic thermometer
It assesses electrical resistance variations which are then converted to temperature changes.