9 ELECTRICAL CONTROLS FOR BURNERS FOR INDUSTRIAL FURNACES, KILNS, OVENS, DRYERS, PROCESS HEATERS, AND BOILERS; AIR FUEL RATIO FLOW ELECTRICAL CONTROLLERS, CONTROL VALVES FOR REGULATING THE FLOW OF GASES AND LIQUIDS FOR INDUSTRIAL FURRNACES, KILNS, OVENS, DRYERS, PROCESS HEATERS, AIR HEATERS AND BOILERS; MODULATING HIGH AND LOW AND ON OFF ELECRICAL CONTROLLERS FOR GASEOUS AND LIQUID FUEL AND OXIDANT FOR INDUSTRIAL FURNACES, KILNS, OVENS, DRYERS, PROCESS HEATERS, AIR HEATERS, AND BOILERS; AUTOMATIC ADJUSTABLE PORT VALVES FOR GASEOUS AND LIQUID FUEL AND OXIDANT FOR INDUSTRIAL FURNACES, KILNS, OVEN, DRYERS, PROCESS HEATERS, AIR HEATERS AND BOILERS; ANNUNCIATORS, namely, SIGNAL PROCESSORS FOR ELECTRICAL CONTROLS FOR BURNERS FOR INDUSTRIAL FURNACES, KILNS, OVENS, DRYERS, PROCESS HEATERS, AIR HEATERS AND BOILERS