LENOX INSTRUMENTS' Portable FireSight diagnostic system achieves real-time color video monitoring and digital recording of combustion and process control in boilers, furnaces, kilns, incinerators. Operators can use one unit for diagnostics, testing, monitoring, and recording of several individual boiler or furnace functions operating at any level using any available 1.625-in. opening. Entirely self-contained, consisting of an air filtration and power system and 8-in. CCD color monitor.