UVTRON 是紫外线开/关探测器，可快速远距离检测火焰发出的微弱 UV，因而适合用于火焰探测器和火警。它们的光谱灵敏度范围是 185 nm 到 300 nm，且对可见光完全不敏感。它们使设计具有简单电路的高灵敏度、快速响应的 UV 检测系统成为可能。

Operating principle

When UV light emitted from flames or discharges reaches the UVTRON and strikes the cathode, photoelectrons are released from the cathode surface. These photoelectrons are drawn toward the anode while colliding with gas molecules and ionize them, producing secondary electrons. The electrons then repeatedly collide with and ionize other gas molecules until finally reaching the anode. By using this phenomenon called gas multiplication, UVTRON amplifies the electrical current and outputs it as a signal.

主要型号有R2868、R9454、R9533、R13192等。

主要应用场合如下：包括大型复杂设施和仓库中的火警、锅炉火焰监测、氢火焰检测（氢作为一种新能源正在引起广泛关注）以及一般行业的其他任务。