... 2,Setup MBUS, connect to GPRS 3,No require water quality Ultransonic heat meter1,Adopting forging process for pipeline2,Forged ... Ultransonic channel have no reflection surface so it won't stop water flow4,Conplelty not affected by impurities,chemicals and magnetic ... .The permissible error conform to related requirement of JJG 225-2001.Setup MBUS, connect to GPRS Factory price of Ultrasonic heat meter