Abstract: A flow switch used in conjunction with a fuel meter in a fuel dispenser to determine when fuel is flowing. A flow switch can only be activated if fuel is flowing through the flow path of the flow switch. If fuel is flowing as indicated by the fuel flow switch, but the meter is not registering fuel flow, there is a meter error, which may be an error internally with components of the meter and/or a pulser that generates pulse signals indicative of fuel flow. If the meter pulser is registering fuel flow, but the flow switch is not registering fuel flow, then an error exists with the flow switch. If fuel is flowing and there are no errors, both the meter and the flow switch should indicate fuel flow.

Abstract: A flow switch used in conjunction with a fuel meter in a fuel dispenser to determine when fuel is flowing. A flow switch can only be activated if fuel is flowing through the flow path of the flow switch. If fuel is flowing as indicated by the fuel flow switch, but the meter is not registering fuel flow, there is a meter error, which may be an error internally with components of the meter and/or a pulser that generates pulse signals indicative of fuel flow. If the meter pulser is registering fuel flow, but the flow switch is not registering fuel flow, then an error exists with the flow switch. If fuel is flowing and there are no errors, both the meter and the flow switch should indicate fuel flow.

Abstract: A lower cost meter comprised of an inner housing constructed out of a high permeable material surrounded by an outer housing constructed out of a lower cost, lower permeable material. A port is placed in the outer housing that runs down to the surface of the inner housing to detect the rotation of a rotational component that rotates inside the meter as fluid or gas flows through the meter. A sensor is placed in the port to detect rotation of the rotational component through the lower permeable material inner housing . The lower cost meter can be used for any application for measuring fluid or gas, and may be used in a service station environment for measuring fuel or vapor in vapor recovery applications.

Abstract: A flow switch used on conjunction with a fuel flow meter in a fuel dispenser to determine when fuel flow rate signals form a fuel flow meter should be ignored in the calculation of flow rate and/or volume of fuel dispensed. An inferential fuel flow meter may be used as the fuel flow meter. The inferential fuel flow meter may be a turbine flow meter that comprises one or more turbine rotors that rotate in response to fuel flow flowing through the turbine flow meter. The turbine rotors may continue to generate pulses even when fuel is no longer flowing. A flow switch determines when fuel is actually flowing and fuel is not actually flowing. The flow switch is described as either a single poppet or dual poppet flow switch in examples described herein.