Automatic identification device and automatic identification system

The utility model provides an automatic identification device, which is used for measuring a flowmeter assembled by a pipe and a flange and comprises a base, a first measuring piece, a second measuring piece and a third measuring piece, and the base is used for placing the flowmeter and moving the flowmeter to a first position for measurement; the first measuring piece is arranged to move downwards to the top of the flange to measure the length of the flow meter; the second measuring piece is arranged to horizontally move to the periphery of the flange so as to measure the outer diameter of the flange; the third measuring piece is arranged to measure the thickness of the flange; based on the measurement, the attribute value capable of uniquely determining the flowmeter product can be automatically obtained, and the product model is uniquely determined through the obtained attribute value, so that the selection of subsequent programs is facilitated. The utility model also provides an automatic identification s