Preparation of kerosene based nano-magnetic fluid and its application in pressure difference sensors

A new-style functional nanomaterial-magnetic fluid and its preparing technology was studied. The preparing method of the kerosene based nano-magnetic fluid was presented and the characteristic of the magnetic fluid was studied. The principle and inductance calculation of the pressure difference sensor with magnetic fluid was presented based on the fluidity and paramagnetism of magnetic fluid. The calculated voltage difference was proportional to the difference of the magnetic fluids in the limbs and inverse ratio to the square of the coil length. The results demonstrated that the design and the research work of the pressure difference sensor with magnetic fluids is feasible.