FS4001 series gas flow sensors are specially designed for the measurement and process control of various types of small flow gases. This series of sensors are all made by the company's self-developed micro-electromechanical system (MEMS) flow sensor chip, which is suitable for all kinds of clean gases. The unique packaging technology makes it suitable for all kinds of pipe diameters, low cost, easy to install, does not require temperature and pressure compensation, and can replace the traditional flow sensor of volumetric or differential pressure type