Fischer&Porter Limi ted,Chengde Automation Equipment Co., Ltd. is a production enterprise specializing in the research and development, production, and sales of flow meters in the world. Its products are widely used in industries such as petroleum, chemical, metallurgy, pharmaceuticals, food, and papermaking, mainly used for measuring the flow of complex media such as liquids, gases, and vapors. It is one of the largest professional flow meter manufacturers in the world.