Yantai dongrun Instrument Co., Ltd. founded in 1998. It specializes in manufacturing online water quality analysis equipment, level meters, pressure gauges, flow meters, special temperature gauges and laboratory analysis equipment. Our company cooperates with Chinese Academy of Sciences and builds up a water analysis laboratory, mainly producing TOC analyzer, ammonia analyzer, fluorescence oxygen analyzer, etc. We have passed the ISO9001 certification. Our professional R & D team can provide technical supports to satisfy customer demand and our unique technologies can meet different working conditions.