Pyroelectric Detectors for Flame Sensor Technology
In flame sensor technology pyroelectric detectors recognize radiation from burning gases, liquids or solids and can identify them using their characteristic IR spectrum. The typical spectral radiation of burning organic materials such as wood, natural gas, oil or plastic is recorded. Two independent criteria of a flame are evaluated in order to rule out a false alarm from the sun or other intense light sources (e.g. sun or welding arc):
- An open flame (in contrast to solar radiation) is characterized by a flicker frequency between 1 and 5 Hz.
- In addition to the combustion gas of hydrogen H2O, a hydrocarbon flame also produces that of carbon CO and CO2. Their emission bands are in the infrared spectral range between a 4.0 and 4.8 µm wavelength. In order to obtain a high signal, wide IR bandpasses are used as detector windows, which include 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.