Thermometry: The thermometry is the branch of temperature measurement, which discusses the strategies of measuring the temperature at 510০ C and below. The tool used in this purpose that is a thermometer. There has many types of thermometer.

Pyrometry: Pyrometry is the branch of temperature measurement, which discusses the strategies of measuring the temperature at 510০ C and above it is called pyrometry, and the tool used in this purpose is called pyrometer. There has a different type of pyrometer. The mercury thermometer, which is used usually, can be measured from -39০ till +350০ C temperature.

How to Temperature measurement by color?

It is very easy to determine the temperature by observing hot metal’s color. There is a moderate relationship between the metal’s temperature and color, which is given in the following list. Without an unwise person, the temperature idea can be given by observing the color of hot metal.

Temperature measurement by color
Color Temperature (°C)
Pale red510
Dark red 620
Dark blood color650
Red blood color700
Bright blood color800
Dark orange900
Yellow980
Orange950

Modern Temperature Measurement Tools

Instruments Temperature limit (°C)
Thermometer inside the glassAbout – 37° to + 500°
The mercury thermometer is molten silicaAbout – 37° to + 510°
Gas Extend Thermometer (N2 )About – 129° 7 to + 427°
Metal propagation thermometerAbout – 73° to + 537°
Resistance pyrometerAbout – 212° to + 593°
Thermoelectric pyrometer0° to + 1648°
Thermoelectric pyrometer (Base metal) 0° to + 1000°
Segar Cone 600° to + 2000°
Radiation pyrometer 538° from upwards
Optical pyrometer 650° from upwards

LEAVE A REPLY

Please enter your comment!
Please enter your name here