Flame sensors and flame detectors for burners; ignition detection systems comprised of ignition detectors and flame scanners; integrated pilot and flame detection systems comprised of gas and flame detectors and sensors; electronic flame detectors for furnaces or boilers; electrical and electronic combustion control systems, namely, PLC's, power supplies, I/O modules, memory discs, and recorded computer software for industrial thermal oxidizers and flares; electronic controls for industrial, boilers and incinerators; electronic flame detection apparatus for pilot igniters; flame supervision apparatus; flame supervision apparatus integrated with flare ignition control systems; recorded computer software for controlling and monitoring the operation of industrial thermal oxidizers and flares; alarms and warning apparatus to alert malfunction of industrial thermal oxidizers and flares, namely, audible and visible notification appliances, namely, bar graph indicators, namely, electronic indicator boards featuring bar graphs, warning lamps, touch screen displays, annunciators, alarm bells and sirens