What type of measurement is critical for flame detection in combustion systems?

Flame detection in combustion systems relies heavily on the recognition of the light emitted by the flame. Flames produce specific wavelengths of light, particularly in the infrared and ultraviolet spectra, which can be detected by photodetectors designed for this purpose. This capability allows the detection system to identify the presence of a flame and confirm that combustion is occurring safely and efficiently.

By monitoring light intensity, the detection system can also assess the stability and integrity of the flame. A decrease in light intensity, for example, might indicate that the flame is weakening or has gone out, which is critical information for safety measures. Therefore, the measurement of light intensity is essential for ensuring proper operation and the safety of combustion processes.

Heat intensity, airflow speed, and temperature, while important for various aspects of combustion and system performance, do not provide the specific and immediate information necessary for flame detection that light intensity does.