F |
| Fluoride High Range Checker HC reagents for 20 tests (Fluoride HR) |
| Fluoride High Range Handheld Colorimeter, Checker HC, 0.0 to 20.0 ppm |
| Fluoride Low Range Checker HC Reagents for 20 tests (Fluoride LR) |
| Fluoride Low Range Handheld Colorimeter, Checker HC, 0.00 to 2.00 ppm |
| Free Chlorine Checker HC |
| Free Chlorine Checker Ultra Low Range Reagents for 25 tests |
| Free Chlorine Ultra Low Range Checker HC |
| Freshwater Alkalinity Colorimeter - Checker HC |