9 Measuring, detecting and monitoring instruments, indicators and controllers, namely regulating and control systems comprising electronic sensors and regulators of speed, acceleration, voltage, amperage, or pressure, electrical controllers and data processors for operating compressors as parts of machines, motors and engines; Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current; electrical cables; Programmable logic controllers; Automated digital controls for compressors as parts of machines, motors and engines; Digital electronic controllers for compressors as parts of machines, motors and engines; Automatic combustion control machines and instruments; Automatic pressure control machines and instruments; Fuel cells