FLOW MEASUREMENT DEVICE

Flow measurement device (100) includes flow rate measurement unit (104), arithmetic unit (108) that calculates a difference value between a the first flow rate value and a second flow rate value, and difference value conversion unit (112) that calculates a flow rate ratio, based on the difference value. In addition, flow measurement device (100) includes appliance characteristic extraction unit (114) that extracts at least one appliance characteristic quantity indicating a characteristic of a flow rate change, and that extracts a value calculated from a first flow rate value and a second flow rate value, as at least one appliance characteristic quantity, in a case where the flow rate ratio falls within a reference range. Furthermore, flow measurement device (100) includes appliance inherent characteristic information holding unit that holds one or more appliance inherent characteristic quantities indicating a characteristic flow rate state of a specific gas appliance, and appliance discrimination unit (116) that discriminates a gas appliance, based on a comparison between the appliance characteristic quantity and the appliance inherent characteristic quantity.