Suitable for the measurement on the flow of the small caliber and low speed medium. Applicable to the measurement on the flow of the media with low Reynolds number. Relatively small damage due to the pressing Simple structure, reliable performance, little maintenance and long service life. Less strict requirements on the upstream straight tube Relatively wide ratio of range: 10:1 Single axial sensitive indication Non-contact coupling drive structure that can ensure the stability in displacement transmission Intelligentized KVD transducers fall into two categories: field display and intelligentized remote transmission. It has the function of displaying on line the instantaneous flow and aggregate flow in two lines on the LCD. It can set up parameters and recover data while power is off.