The theoretical and experimental investigation on the vertical magnetic fluid pressure sensor

• In this paper, a novel vertical magnetic fluid pressure sensor was proposed.
• The innovative theoretical model was built to direct the experimental research.
• The input pressure and the output voltage meet the linear relationship in a certain measuring range, which shows the feasibility of using in the industry and aviation in the future.

In this paper, an innovative pressure sensor exploiting magnetic fluid is presented. The device consists of a compound magnetic core, a glass pipe and a couple of sensing coils. The sensing coils detect the position of the compound magnetic core at a particular frequency. Then a theoretical analysis of the sensing methodology is performed, along with experiments on the laboratory-scale prototype of the vertical magnetic fluid pressure difference sensor. The open type magnetic fluid pressure sensor shows the satisfactory linearity and high reliability, and the enclosed type exhibits the characteristics of wide-range and low-cost. All these results indicate the feasibility of the vertical magnetic fluid pressure sensor.