Vortex flowmeter is a speed flow meter based on the theory of natural vibration of fluid and piezoelectric crystal or differential capacitor as the detection component. This product adopts unique differential technology, with isolation, shielding, filtering and other measures, to overcome the same products of poor seismic resistance, large noise, small signal data disorder and other problems, and adopts a unique detection probe packaging new technology and protective measures, to ensure the reliability of the product.