... the real manufacture of ultrasonic flow meter,water meter,calorimeter,ultrasonic thickness gauge,flaw detector. Model style ultrasonic flow meterTechnology features:1 ... ,to make calorimeter has the function of displaying heat quantity. Three channel 4-20mA input optional,accuracy ... rate,velocity,positive,negative,net totaliser flow rate.6:operating: 4 keypad tactile keyboard operating7:other functions ...