... the real manufacture of ultrasonic flow meter,water meter,calorimeter,ultrasonic thickness gauge,flaw detector. Model style ultrasonic flow meterTechnology features:1:operating power ... there wire platinum resistor(used for calorimeter)6: fixture(applied with installation of transducers on cast iron,GRP,PVC,etc. that ... thickness of pipe,reduce error,increase accuracy) module style ultrasonic flow meter