... straight-through design 304 stainless steel Encrust-preventing Ultrasonic Heat Meter 10years quality assurance Full straight-through ... holder 13,M-BUS module6,Temperature sensor 14,Obturating ring7,Waterproof circuit board 15,Reflective surface8,Circuit ... high reliability.(2)Advanced sensor technologyUH Ultrasonic Heat Meter adopts patent technology of ultrasonic transducerstructure to realize the ...