WATER SUPPLY OF COLORIMETER FOR WATER QUALITY CONTROL DISTRIBUTED IN SIX (6) LOTS: Lot N°1: Colorimeter and accessories Lot N°2: Colorimeter kit for free chlorine Lot N°3: pH colorimetric kit 7.0¿8.6 / 60 tests Lot N°4: pH colorimetric kit 5,226.8 / 180 tests Lot N°5: Iron colorimetric kit 0.06¿1mg/l / 75 tests Lot N°6: Iron colorimetric kit 0.3¿5mg/1/