Optical pyrometers - advantages and disadvantages?

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In summary, an optical pyrometer is a temperature measuring device that uses thermal radiation to determine the temperature of an object without physical contact. Its main advantages include non-contact measurement, quick response time, and a wide range of temperature measurement. However, limitations include only being able to measure surface temperature, requiring a clear line of sight, and being affected by factors such as surface emissivity and ambient temperature. Compared to other temperature measurement devices, it offers a safer and wider range of measurement but may not be as precise as thermocouples and RTDs. Optical pyrometers are commonly used in industries such as metallurgy, glass manufacturing, foundries, and research and development.
  • #1
stevenbarea
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Hello I really want to know what the advantages and disadvantages of optical pyrometers are?


Thanks a lot
 
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  • #2
+ Cheap, rugged, high temperature, wie bandwidth
- Low senstitvity, poor time response.
 
  • #3
What mgb_phys said, and ...

Advantage:
non-contact measurement.

Disadvantage:
object must be hot enough to radiate visibly
systematic error from emissivity difference between pyrometer filament and object
 

1. What is an optical pyrometer?

An optical pyrometer is a type of temperature measuring device that uses the principle of thermal radiation to determine the temperature of an object without making physical contact.

2. What are the advantages of using an optical pyrometer?

The main advantage of an optical pyrometer is its non-contact measurement, which means it can measure the temperature of hot or hazardous objects from a safe distance. It also has a quick response time and can measure a wide range of temperatures.

3. Are there any limitations or disadvantages to using an optical pyrometer?

One limitation of an optical pyrometer is that it can only measure the surface temperature of an object, not its internal temperature. It also requires a clear line of sight to the object being measured, and its accuracy can be affected by factors such as surface emissivity and ambient temperature.

4. How does an optical pyrometer compare to other types of temperature measurement devices?

Compared to contact thermometers, an optical pyrometer offers a safer and non-invasive way to measure temperature. It also has a wider range of temperature measurement compared to other non-contact devices such as infrared thermometers. However, for precise measurements, thermocouples and RTDs are still more accurate.

5. In what industries or applications are optical pyrometers commonly used?

Optical pyrometers are commonly used in industries such as metallurgy, glass manufacturing, and foundries where high temperatures need to be measured without making physical contact with the object. They are also used in research and development, aerospace, and automotive industries.

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