Term
| What are the various methods that can be used to measure temperature? |
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Definition
1] Mercury or Alcohol Thermometers
2] Platinum Resistance Thermometer
3] Thermistors
4] Thermocouples
5] Optical Pyrometer
6] Infrared Thermometers |
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Term
| How do Mercury and Alcohol thermometers work? |
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Definition
| Based on the differential volume thermal expansion of the material in the thermometer. Material expands or contracts to calculated temperature marking on the thermometer. |
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Term
| How does a Platinum Resistance Thermometer works? |
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Definition
| Conductor which measures the resistance corresponding to how a metal conducts electrons at different temperatures. Resistance varies with temperature. For conductors resistance increases with increasing temperature and resistance decreases with decreasing temperature. |
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Term
| How does a Thermistor work? |
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Definition
| Semiconductor which measures the change in resistance in relation to changing temperatures. Resistance varies with temperature. For semiconductors resistance decreases with increasing temperature and resistance increase with decreasing temperature. |
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Term
| How does a Thermocouple work? |
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Definition
| Works based on the Seebeck effect. The Seebeck effect is a phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a potential. The potential is a function of temperature. |
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Term
| How does an Optical Pyrometer work? |
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Definition
| Works based on the wavelength of light that it detects using principles of blackbody radiation. |
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Term
| How does an Infrared Thermometer work? |
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Definition
| Measures the temperature of an object based on the wavelength of light that it detects from the IR range. |
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