CW-612-Y dual bellows differential pressure meter has pressure auto condensation device. It matches with throttling device to measure flow of industrial steam. It can totalize the flow continuously. It also can measure other gas flow. The flowmeter has recording device which can record the instantaneous flow on the recording sheet. It also can measure and indicate differential pressure, pressure and flow on site and output O～1OmA standard signal. It also can be used with DDZ-Ⅱelectric unit combination instrument to realize auto control and anti-regulate for measured fluid.