Which of the following devices is used to measure relatively high temperatures, such as encountered in furnaces?

Question

Question

This question was previously asked in

NTPC CBT-I (Held On: 7 Jan 2021 Shift 2)

Answer 1

The correct answer is Pyrometer.

Key Points

Pyrometer
- The device for measuring relatively high temperatures, such as are encountered in furnaces. Hence, Option 2 is correct.
- Most pyrometers work by measuring radiation from the body whose temperature is to be measured.
- Radiation devices have the advantage of not having to touch the material being measured.
- Radiation Pyrometers are used to measure the temperature of red hot metals up to 3000°C.
- It is also known as an Infrared thermometer or Radiation thermometer or non-contact thermometer used to detect the temperature of an object’s surface temperature, which depends on the radiation (infrared or visible) emitted from the object.
- It acts as a photodetector because of the property of absorbing energy and measuring EM wave intensity at any wavelength.
- These are used to measure high-temperature furnaces.
- These devices can measure the temperature very accurately, precisely, pure visually, and quickly.
- Pyrometers are available in different spectral ranges ( since metals – short wave ranges and non-metals-long wave ranges).

Pyrometer-Working-Principle

Additional Information

An ammeter

It is a measuring instrument used to measure the current in a circuit. Electric currents are measured in Amperes, hence the name.
The ammeter is usually connected in series with the circuit in which the current is to be measured.

Barometer

Fluxmeter

The search coil magnetometer or induction magnetometer, based on an inductive sensor, is a magnetometer that measures the varying magnetic flux.
An inductive sensor connected to a conditioning electronic circuit constitutes a search coil magnetometer.