| Parameter | Range | Displayed As | Code | 
| Aluminium | 0 to 0.3 | mg/l Al | CTK001 | 
| CHECKIT® Aluminium Comparator Disc |  |  | 146200 | 
| Aluminium No 1 tablets (50 pk) |  |  | SDT147 | 
| Aluminium No 2 tablets (50 pk) |  |  | SDT148 | 
| Amine | 0 to 15 | mg/l | CTK060 | 
| Amine Comparator Disc |  |  | 255005 | 
| Amine Indicator Solution (65 ml) |  |  | SDT643-65 | 
| Amine Buffer Solution (65 ml) |  |  | SDT644-65 | 
| Amine Solvent (100 ml) |  |  | SDT645-100 | 
| Extraction Tube for Amine Kit |  |  | AF260 | 
| Ammonia | 0 to 1 | mg/l N | CTK002 | 
| CHECKIT® Ammonia Comparator Disc |  |  | 146210 | 
| Ammonia No 1 tablets (50 pk) |  |  | SDT245 | 
| Ammonia No 2 tablets (50 pk) |  |  | SDT244 | 
| Bromine | 0 to 5 | mg/l Br2 | CTK003 | 
| CHECKIT® Bromine Comparator Disc |  |  | 146280 | 
| DPD No 1 tablets (50 pk) |  |  | SDT106 | 
| DPD Nitrite powder (20 g) |  |  | SDT295 | 
| Bromine (Liquids) | 0 to 5 | mg/l Br2 | CTK003L | 
| CHECKIT® Bromine Comparator Disc |  |  | 146280 | 
| DPD No 1 Solution A (30 ml) |  |  | SDT505-30 | 
| DPD No 1 Solution B (30 ml) |  |  | SDT506-30 | 
| DPD Nitrite powder (20 g) |  |  | SDT295 | 
| Carbohydrazide LR | 0 to 0.65 | mg/l | CTK049 | 
| Carbohydrazide LR Comparator Disc |  |  | 255011 | 
| Carbohydrazide LR Test Solution (65 ml) |  |  | SDT654 | 
| Carbohydrazide LR Indicator Solution (65 ml) |  |  | SDT741 | 
| Chlorine VLR | 0 to 1 | mg/l Cl2 | CTK004 | 
| CHECKIT® Chlorine VLR Comparator Disc |  |  | 146010 | 
| DPD No 1 tablets (50 pk) |  |  | SDT106-50 | 
| DPD No 3 tablets (50 pk) |  |  | SDT107-50 | 
| Chlorine VLR (Liquids) | 0 to 1 | mg/l Cl2 | CTK004L | 
| CHECKIT® Chlorine VLR Comparator Disc |  |  | 146010 | 
| DPD No 1 Solution A (30 ml) |  |  | SDT505-30 | 
| DPD No 1 Solution B (30 ml) |  |  | SDT506-30 | 
| DPD No 3 Solution C (30 ml) |  |  | SDT507-30 | 
| Chlorine LR (Free & Total) | 0 to 4 | mg/l Cl2 | CTK005 | 
| CHECKIT® Chlorine LR Comparator Disc |  |  | 146020 | 
| DPD No 1 tablets (50 pk) |  |  | SDT106-50 | 
| DPD No 3 tablets (50 pk) |  |  | SDT107-50 | 
| Chlorine LR (Liquid) | 0 to 4 | mg/l Cl2 | CTK005L | 
| CHECKIT® Chlorine LR Comparator Disc |  |  | 146020 | 
| DPD No 1 Solution A (30 ml) |  |  | SDT505-30 | 
| DPD No 1 Solution B (30 ml) |  |  | SDT506-30 | 
| DPD No 3 Solution C (30 ml) |  |  | SDT507-30 | 
|  | 10 to 300 | mg/l Cl2 | CTK006 | 
| CHECKIT® Chlorine HR Comparator Disc |  |  | 146030 | 
| Chlorine HR Reagent (30 ml) |  |  | SDT179-30 | 
| Acidifying Solution (30 ml) |  |  | SDT180-30 | 
| Chlorine LR & HR | 0 to 4 10 to 300 | mg/l Cl2 | CTK028 | 
| CHECKIT® Chlorine LR Comparator Disc |  |  | 146020 | 
| CHECKIT® Chlorine HR Comparator Disc |  |  | 146030 | 
| DPD No 1 Tablets (50 pk) |  |  | SDT106-50 | 
| DPD No 3 Tablets (50 pk) |  |  | SDT107-50 | 
| Chlorine HR Reagent (30 ml) |  |  | SDT179-30 | 
| Chlorine Acidifying Solution (30 ml) |  |  | SDT180-30 | 
| Copper LR (Free) | 0 to 1 | mg/l Cu | CTK008 | 
| CHECKIT® Copper LR Comparator Disc |  |  | 146230 | 
| Copper/Zinc LR tablets (50 pk) |  |  | SDT149-50 | 
| Copper HR (Free & Total) (Soluble Copper only, Insoluble requires acid digestion) | 0 to 5 | mg/l Cu | CTK010 | 
| CHECKIT® Copper HR Comparator Disc |  |  | 146430 | 
| Copper No 1 tablets (50 pk) |  |  | SDT240-50 | 
| Copper No 2 tablets (50 pk) |  |  | SDT239-50 | 
| Copper LR (Free) & HR (Free & Total) (Soluble Copper only, Insoluble requires acid digestion) | 0 to 5 | mg/l Cu | CTK034 | 
| CHECKIT® Copper LRComparator Disc |  |  | 146230 | 
| CHECKIT® Copper HR Comparator Disc |  |  | 146430 | 
| Copper / Zinc LR tablets (50 pk) |  |  | SDT149-50 | 
| Copper No 1 tablets (50 pk) |  |  | SDT240-50 | 
| Copper No 2 tablets (50 pk) |  |  | SDT239-50 | 
| DEHA | 0 to 0.5 | mg/l | CTK011 | 
| CHECKIT® DEHA Comparator Disc |  |  | 146370 | 
| DEHA Indicator Solution (65 ml) |  |  | SDT739-65 | 
| DEHA Test solution (30 ml) |  |  | SDT166-30 | 
| Hydrogen Peroxide | 0 to 100 | mg/l H2O2 | CTK053 | 
| Hydrogen Peroxide Comparator Disc |  |  | 255040 | 
| Hydrogen Peroxide HR [Rapid] Tablets (50 pk) |  |  | SDT672-50 | 
| Acidifying PT Tablets (50 pk) |  |  | SDT673-50 | 
| Iron LR* | 0.05 to 1 | mg/l Fe | CTK012 | 
| CHECKIT® Iron LR Comparator Disc |  |  | 146220 | 
| FE5 (65 ml) |  | SDT110 | 
| Iron LR (Total)* | 0.05 to 1 | mg/l Fe | CTK012T | 
| CHECKIT® Iron LR Comparator Disc |  |  | 146220 | 
| FE5 (65 ml) |  | SDT110 | 
| Sulphuric Acid 50% (65 ml) |  |  | SDT155 | 
| Iron LR (Total & Soluble) [Filtration Included] | 0.05 to 1 | mg/l Fe | CTK012F | 
| CHECKIT® Iron LR Comparator Disc |  |  | 146220 | 
| FE5 (65 ml) |  | SDT110 | 
| Sulphuric Acid 50% (65 ml) |  |  | SDT155 | 
| Iron MR* | 0.5 to 5 | mg/l Fe | CTK056 | 
| Iron MR Comparator Disc |  |  | 255050 | 
| FE9 (65 ml) |  | SDT723 | 
| Iron MR (Total)* | 0.5 to 5 | mg/l Fe | CTK056T | 
| Iron MR Comparator Disc |  |  | 255050 | 
| FE9 (65 ml) |  | SDT723 | 
| Sulphuric Acid 50% (65 ml) |  |  | SDT155 | 
| Iron MR (Total & Soluble)* | 0.5 to 5 | mg/l Fe | CTK056F | 
| Iron MR Comparator Disc |  |  | 255050 | 
| FE9 (65 ml) |  | SDT723 | 
| Sulphuric Acid 50% (65 ml) |  |  | SDT155 | 
| Iron HR* | 0.5 to 10 | mg/l Fe | CTK013 | 
| CHECKIT® Iron HR Comparator Disc |  |  | 146320 | 
| FE6 (65 ml) |  |  | SDT113 | 
| FE8 (65 ml) |  |  | SDT128 | 
| Iron HR (Total & Soluble) [Filtration Included] | 0.5 to 10 | mg/l Fe | CTK040 | 
| Iron HR Comparator Disc |  |  | 146320 | 
| FE6 (65 ml) |  |  | SDT113 | 
| FE8 (65 ml) |  |  | SDT128 | 
| Iron LR & HR (Total & Soluble) [Filtration Included] | 0.05 to 10 | mg/l Fe | CTK027F | 
| Iron HR Comparator Disc |  |  | 146320 | 
| FE5 (65 ml) |  |  | SDT110 | 
| FE6 (65 ml) |  |  | SDT113 | 
| FE8 (65 ml) |  |  | SDT128 | 
| Sulphuric Acid 50% (65 ml) |  |  | SDT155 | 
| Manganese | 0 to 5 | mg/l Mn | CTK062 | 
| Manganese Comparator Disc |  |  | 255080 | 
| Manganese Reagent 1 (30 ml) |  |  | SDT771 | 
| Manganese Reagent 2 (30 ml) |  |  | SDT772 | 
| Manganese Reagent 3 (30 ml) |  |  | SDT773 | 
| Molybdate | 0 to 100 | mg/l MoO4 | CTK016 | 
| Molybdate Comparator Disc |  |  | 146290 | 
| Molybdate HR reagent (65 ml) |  |  | SDT127 | 
| Molybdate HR | 0 to 500 | mg/l MoO4 | CTK038 | 
| Molybdate VHR Comparator Disc |  |  | 256295 | 
| Molybdate HR reagent (65 ml) |  |  | SDT127 | 
| Nitrate HR | 10 to 100 | mg/l NO3 | CTK018 | 
| Nitrate HR Comparator Disc |  |  | 255060 | 
| Nitrate HR Powder (40 g) |  |  | SDT748 | 
| Ozone | 0 to 1 | mg/l O3 | CTK020 | 
| CHECKIT® Ozone (DPD) Comparator Disc |  |  | 146275 | 
| DPD Glycine Tablets (50 pk) |  |  | SDT146 | 
| DPD No 4 Tablets (50 pk) |  |  | SDT248 | 
| pH | 4 to 10 |  | CTK021 | 
| CHECKIT® pH Universal Comparator Disc |  |  | 146130 | 
| Universal pH Solution (65 ml) |  |  | SDT164 | 
| Phosphate LR | 0 to 4 | mg/l PO4 | CTK022 | 
| CHECKIT® Phosphate LR Comparator Disc |  |  | 146240 | 
| CRP Reagent (65 ml) |  |  | SDT236 | 
| Absorbic Acid (10 g) |  |  | SDT237 | 
| Phosphate HR (Tablets) ** | 0 to 80 | mg/l PO4 | CTK023 | 
| CHECKIT® Phosphate HR Comparator Disc |  |  | 146250 | 
| Phosphate HR Tablets (50 pk) |  |  | SDT163-50 | 
| Phosphate HR (Tablets) [Filtration Included] | 0 to 80 | mg/l PO4 | CTK023TF | 
| CHECKIT® Phosphate HR Comparator Disc |  |  | 146250 | 
| Phosphate HR Tablets (50 pk) |  |  | SDT163-50 | 
| Phosphate HR (Liquid) [Filtration Included] | 0 to 80 | mg/l PO4 | CTK023LF | 
| CHECKIT® Phosphate HR Comparator Disc |  |  | 146250 | 
| PB1 (65 ml) |  |  | SDT111 | 
| PB2 (65 ml) |  |  | SDT112 | 
| Silica LR | 0.25 to 4 | mg/l SiO2 | CTK025P | 
| CHECKIT® Silica LR Comparator Disc |  |  | 146350 | 
| Silica Reagent 1 (65 ml) |  |  | SDT233 | 
| Silica Reagent 2 (65 ml) |  |  | SDT234 | 
| Silica Reagent 3 (20 g) |  |  | SDT235 | 
| Silica HR | 0 to 100 | mg/l SiO2 | CTK050 | 
| CHECKIT® Silica HR Comparator Disc |  |  | 146351 | 
| Silica HR Powder 1 (20 g) |  |  | SDT735-20 | 
| Silica HR Powder 2 (60 g) |  |  | SDT736-60 | 
| Silica HR Powder 3 (10 g) |  |  | SDT737-10 | 
| Tannin (Tannic Acid) | 0 to 20 | mg/l | CTK066 | 
| Tannin Comparator Disc |  |  | 255090 | 
| Tannin Reagent 1 (65 ml) |  |  | SDT181 | 
| Tannin Reagent 2 (30 ml) |  |  | SDT249 | 
| Zinc | 0 to 1 | mg/l Zn | CTK026 | 
| CHECKIT® Zinc LR Comparator Disc |  |  | 146340 | 
| Copper/Zinc LR tablets (50 pk) |  |  | SDT149-50 | 
| EDTA tablets (30 pk) |  |  | SDT205-30 | 
| Dechlor tablets (30 pk) |  |  | SDT206-30 |