Linear systems provides a range of flame sensors for detecting oil and gas flames with various viewing and mounting arrangements - models uv-01, uv-71-aj, uv-71-sc, etc., designed to detect uv radiations emitted by a naked flame. These are immune to visible light and refractory glow from furnace walls. The company`s designs include protective quartz glass cover, ¾" npt and bsw mounting with optional air-cooling. Also available a new model self-checking uv sensor [uv-71-sc].