Fireye UV90L系列火焰检测器
UV90L系列火焰检测器专为正面和侧面（90°）安装而设计，在某些应用中，扫描仪可以更清晰地观察火焰。

UV火焰检测器非常适合气体燃料（天然气和丙烷）。 但是，它可用于检测标准燃气，某些废气和轻油燃料（如2号油）的火焰。 可以使用UV扫描仪检测来自较重油的火焰，但未燃烧的燃料罩和/或雾化罩可以阻止UV从火焰区域通向UV管，从而导致令人讨厌的燃烧器/锅炉跳闸。 对于重于2号的燃油，以及将废气与天然气作为主火焰一起燃烧的一些装置，建议使用红外线检测

Fireye  UV1A Series Scanner
Ultraviolet miniature non self-checking scanners. The UV1A is suitable for fuel gases and no. 2 oil. Non-replaceable tube.

The UV tube is made of quartz and is filled with a gas that ionizes when struck by UV radiation from the flame. In the absence of UV radiation, the gas acts as an insulator between two electrodes which are mounted inside the tube. These electrodes are energized continuously by a high voltage. During
combustion, UV radiation ionizes the gas, causing current pulses to flow between the electrodes. These current pulses result in a flame signal which is transmitted to the amplifier in the control, where it is processed to energize or hold in the flame relay.