AFTLD/D battery-powered electromagnetic flow meter converter using internal battery supply no need external power supply ,it is suitable for wild power grid which can not arrive and power grid laid the operation of the difficult situation,especially suitable for tap water system monitoring,measurement and installment .AFTLD/D battery-powered electromagnetic converter using low power consumption circuit technology design ,reliable,efficient excitation,signal processing circuit implementation measurement function,ensure has high reliability and stability of the converter ,and adopt efficient system management technology greatly reduced the system power consumption ,save power costs at the same time achieve precise measurement.