Censtar quick connect coupling for refueling operation, ensure safety oil supply.Switch: to control the motor start and stop (not direct control).Sensors: using the photoelectric conversion device, will flow out of the oil volume can be converted into electrical impulses, for quick connect couplings ensure the device to the computer operation, display.Ensure the computer device: is one containing small tankers application software of microcomputer system, counting, calculation, testing and control, hydraulic coupling  communication function, is a tanker electrical part of the command center.