... meter,calorimeter,ultrasonic thickness gauge,flaw detector. Model style ultrasonic flow meterTechnology features:1:operating power:isolation 8-36VDC2:current: 50mA ... :other functions: automatic memory the positive,negative,net totaliser or flow rate and thermal energy of the last 512 days,128 ... memory the time of power turning on and off and flow rate of the last 30 times, realize to compensate by ...