Our purpose is to fulfill our clients by offering golden company, great price and premium quality for pH ORP EC TDS Salinity MLSS FCL COD NH3-N NO3-N DO Make in China, Dissolved Oxygen Sensor, Waterproof Pen Type Conductivity Meter Tester, Residual Chlorine And Free Chlorine,Liquid Conductivity Sensor. Since establishment in the early 1990s, we have set up our sale network in USA, Germany, Asia, and several Middle Eastern countries. We aim to be a top class supplier for worldwide OEM and aftermarket! The product will supply to all over the world, such as Europe, America, Australia,Italy, Cairo,Munich, Angola.We look forward to hearing from you, whether you are a returning customer or a new one. We hope you will find what you are looking for here, if not, please contact us immediately. We pride ourselves on top notch customer service and response. Thank you for your business and support!