Pyroelectric Detectors for Flame Sensor Technology
In flame sensor technology, pyroelectric detectors detect radiation from burning gases, liquids or solids and can identify them by their characteristic IR spectrum. The typical spectral radiance of burning organic materials such as wood, natural gas, oil or plastics can be detected.
Two independent criteria of a flame are evaluated to exclude a false alarm caused by the sun or other bright light sources (such as arc welding):
- A typical flame (in contrast to solar radiation) is characterized by a flicker frequency of (1 ... 5) Hz.
- A hydrocarbon flame produces combustion gases of carbon CO and CO2. Their emission bands lie in the infrared spectral range from 4.0 to 4.8 micron wavelengths. In order to obtain a high signal, one uses wide IR band-pass filters as the detector window, which includes both the radiation emission of CO2 and CO.
InfraTec offers five different product groups including approximately 50 standard pyroelectric detectors. Choose your suitable infrared detectors with the help of our detailed detector search.