What is the use of laboratory thermometer?

As well known, thermometer is an instrument used to measure temperature.

Thermo is referred to heat and -Meter is referred to the measuring instrument.

The laboratory thermometer is normally Mercury based as it expands at a steady rate and has a higher density than water's. This allow it take a small height to expand compare to water which is 13.6x more than the height of mercury when it expands as their density are 13600kgm/s for mercury and 1000kgm/s for water. Furthermore, the mercury used is not poisonous and therefore is safe to be used by students at school.

Laboratory thermometer is used to measure low temperature which is between -10 degree Celsius to 120 degree Celsius. This is because in school laboratory, the experiments we conduct just within a small range of temperature around the room temperature., which is about 27-29 degree Celsius.