We've improved our clamp-on steam flowmeter so as to measure as low as 0.3MPa by developing the high performance dumping material to reduce the ultrasonic noise that propagate the pipe wall. This newly developed clamp-on ultrasonic steam flowmeter was put into the actual factory site and held a field test. From the measurement results, we found that the flow rate and the valve opening setting signal were changing synchronously, so we believe correct measurement was being held. Although the change in the flow rate with respect to the valve opening setting signal was not smooth, this is considered to be due to a malfunction of the valve as we've already proven that the clamp-on flowmeter output change smoothly to the real flow rate. We will continue to make field tests to find issues in the real site and improve the quality of the flowmeter.
