Project ForgeInstrumentation & Process Control
Measurement Instruments
GATE 2009
Easy
Which ONE of the following sensors is used for the measurement of temperature in a combustion process (T > 1800°C)?
- AType J thermocouple
- BThermistor
- CResistance temperature detector
- Pyrometer
Explanation
At such extreme temperatures, contact sensors (thermocouples, thermistors, RTDs) fail or are far outside their range. A (radiation) pyrometer measures temperature non-contact via emitted radiation, suitable for T>1800°C.
Source: GATE CH 2009 (2009)
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