Diaphragm pump for a fuel cell

An anode stream recirculation system for a fuel cell (80), the fuel cell including an anode gas input and an anode gas output, the anode stream recirculation system comprising: an anode gas supply (60); a switch (62) connected with the anode gas supply; a pressure regulating device (64) connected between the switch and the anode gas input of the fuel cell; a diaphragm pump (70) connected between the anode gas output and the anode gas input of the fuel cell thereby forming an anode gas recirculation; wherein the diaphragm pump has at least a sensor electrically connected with the switch.