This Post-doc is defined to answer to various industrial requests for flow sensors and viscosity sensors working on a large range, low cost and able to measure different kind of fluids (liquid or gas). The objective of this post-doc is to consider the design of a new generation of MEMS sensor for measuring flow or viscosity of any fluid that meets the specifications provided by the industry. In particular, the possibilities of using a 3-axis micro-force sensor developed in the laboratory will be explored by exploiting the drag force or the tangential stresses near the walls of the pipes. Different cases will have to be evaluated depending on the flow dynamics of the different fluids. A modeling and sizing of the sensor will have to be developed to determine the interactions with the fluids and the characteristics of the forces in the different flow rates. The candidate should possess strong knowledge on fluidic and microsystems.