... Ultrasonic heat meter 1,Adopting forging process for the pipeline. 2,Setup MBUS, connect to GPRS 3,No require water quality Ultransonic heat ... 2. More than 6 year long-life battery M-bus remote system,optional RS485. Not affected by external ... :1) Low start flow volume Can calculate both heat and cold energy. Installation in the returen flow ... , connect to GPRS Factory price of Ultrasonic heat meter