The fact that Celsius thermometers contain mercury that is very harmful to humans is a disadvantage of their usage.
WHAT IS A THERMOMETER?
A thermometer is an instrument or device that is used to measure the temperature of an object or substance.
The temperature refers to how hot or cold a substance is. Temperature can either be measured in Celsius, Fahrenheit or Kelvin.
TYPES OF THERMOMETERS:
Thermometer can be of different types ranging from mercury thermometer to digital thermometer. One of the types of thermometers is the Celsius thermometer, which measures temperature in degree Celsius (°C).
However, one major disadvantage of using Celsiusthermometers is that they contain dangerous and highly toxic chemical called MERCURY, which is harmful to man.