- The Celsius Scale
The lower fixed point corresponds to 0°C; meanwhile the upper fixed point corresponds to 100°C. The gap between the lower and upper fixed point is divided into 100 equal intervals.
- The Fahrenheit Scale
The lower fixed point corresponds to a temperature of 32 ° Fahrenheit; the upper fixed point corresponds to a temperature of 212 ° Fahrenheit. The gap between the lower and the upper fixed point is divided into 180 equal intervals.
- The Thermodynamic Scale (Kelvin Scale)
This scale has only one point called the triple point of water. This is the point at which ice, water and steam co-exist. The fixed point corresponds to a value of 273.16K.
