COMBO! Hanna Instruments HI701 Checker HC Handheld Colorimeter for Free Chlorine plus (1) HI 701-25 (25 extra tests)
- More accurate than chemical test kits, less expensive than professional testing.
- Uses EPA approved diethyl-p-phenylenediamine (DPD) method, for uses have these requirements.
- Large LCD screen for readability. Auto shut-off to extend battery life.
- Combo pack, HI 701 + (25 reagents) HI 701-25.