Multiparameter water quality analyzer 5B-3B(V10) to test chemical oxygen demand(COD),ammonia nitrogen(NH3-N),total phosphorus(TP),total nitrogen(TN),turbidity,TSS, color, Copper, iron, chromium, nickel, zinc, fluoride, residual chlorine, aniline, nitrate nitrogen, nitrite nitrogen,etc. It is a multi-function spectrophotometer.