a sensor for sensing a flow rate of the gas flow;

a communication device for transmitting information corresponding to the sensed flow rate to a remote device;

an energy harvesting device for producing electrical energy from the gas flow to power operation of the communication device or other component of the flow meter system; and

an energy storage device for storing electrical energy generated by the energy harvesting device,

wherein the energy harvesting device comprises:

a differential pressure conduit having an orifice plate through which the gas flow passes, the sensor comprising a pressure differential sensor for sensing a pressure differential of the gas flow upstream and downstream of the orifice plate using pressure taps; and

a thermoelectric generator to convert heat generated from the gas flow passing through the differential pressure conduit to electrical energy for charging the energy storage device or powering one or more components of the flow meter system,

wherein the information, which corresponds to the flow rate, is transmitted in real time as a pulse signal via the communication device,

wherein the thermoelectric generator is arranged on a thermo-conductive portion of the differential pressure conduit, including the pressure taps and the orifice plate, to convert heat generated from the differential pressure conduit due to the gas flow around and through the orifice plate to electrical energy,

wherein each of the pressure taps extends through the thermoelectric generator from the differential pressure conduit.