Shanghai YOKE Instrument is a CE/ISO certified analytical instrument manufacturer with 19+ years of OEM/ODM experience serving global lab distributors. Main Products: GC, IC, AAS, UV/Vis Spectrophotometer, Flame Photometer, pH Meter, Conductivity Meter, DO Meter, Ion Meter, Potentiometric Titrator, Turbidity Meter, Colorimeter, COD, BOD, Mulit-parameter Water Quality Analyzer, Moisture Analyzer, Balance, etc.