Exhaust Gas Temperature (EGT) refers to the temperature of exhaust gas leaving an aircraft engine’s cylinders after combustion. Because it provides valuable information about the engine’s performance - including fuel consumption and combustion efficiency - and overall flight safety, carefully monitoring the EGT is extremely important for aircraft engineers, technicians and flight crews.

A thermocouple-based temperature sensor - or EGT sensor - is commonly utilized in aero-engine applications to measure the EGT at various engine stages. This sensor’s time response measurement - often defined in terms of a time constant - is a critical parameter because it indicates how quickly the sensor can react to rapid changes in temperature. Any delay in the measurement of temperature drives engine maintenance and affects the survey of engine start, relight and operating temperatures.

Therefore, it is essential to characterize the time constant of EGT sensors on the engine to assess any delay in temperature measurement due to deterioration of the engine or sensors over time. Hence, aircraft engineers and manufacturers use wind tunnel tests to measure time constants for EGT sensors. These measurements ensure accurate data collection during wind tunnel tests.

Our latest whitepaper explores the time response characteristic of an EGT sensor using wind tunnel tests to enable aircraft manufacturers to achieve optimal engine performance. We invite you to read it now.