NB-IOT Smart electromagnetic flow meter will be applied to domestic projects in China. Recently, Shengda water meter won the bidding project for the transformation of domestic listed coal companies. The customer needs 120 sets of DN50, DN100 and DN250 electromagnetic flowmeter with wireless remote transmission function. The customer is very satisfied with the NB-IOT solution provided by us, and finally decided to adopt our solution. After less than 30 days of production, 120 electromagnetic flow meters have been produced and are waiting for delivery.