Chapter 04C - Pyrometer

Chapter 04C - Pyrometer - 5 RADIATION PYROMETER 5 RADIATION...

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Unformatted text preview: 5. RADIATION PYROMETER 5. RADIATION PYROMETER easures mperature y etecting ermal ¡ Measures temperature by detecting thermal radiation from an object without touching the object. ¡ Consists of an optic system which accumulates visible infrared energy and focuses the energy to the detector. ¡ The detector will convert the energy to electricity, where the electric energy is proportionate to temperature. ¡ Radiation emission: ( ) 2 4 W/m T α Ε Dr. Abdirahman CHAPTER 4 Page 46 of 111 where, T is the temperature of the object in Kelvin . Dr. Abdirahman CHAPTER 4 Page 47 of 111 ¡ Thermopile is normally used to detect infrared energy where it normally consists of a few small thermocouples. ¡ These small thermocouples are connected serially to increase sensitivity of the pyrometer where e ffect f erial onnection ill the effect of serial connection will increase the sensitivity of sensor as much as n times. Dr. Abdirahman CHAPTER 4 Page 48 of 111 di ti t j ¡ Radiation pyrometers have one major advantage in that they do not require to be in contact with the hot body in order to measure its temperature. Thus, there is nomeasure its temperature....
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Chapter 04C - Pyrometer - 5 RADIATION PYROMETER 5 RADIATION...

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