Hanna (HI701-25) Free-Chlorine Refill for the Hanna HI701 Checker Handheld Colorimeter (Pack of 25) Chrome3014 carbon block elements

carbon block elements

Built-in antimicrobial media prevents bacterial growth on the filter surface between service cycles

Cation resin strips out positively charged ions like calcium

If you see water dripping from this gap during operation

Hanna (HI701-25) Free-Chlorine Refill for the Hanna HI701 Checker Handheld Colorimeter (Pack of 25) Chrome3014 carbon block elementsHanna Instruments Reagent Refill Hanna HI701 25 Free Chlorine Reagent Pack Twenty five replacement reagents for the HI701 Checker colorimeter. Accurate free chlorine testing from 0. 00 to 2. 50 mg L without guessing at color charts. 25 Tests Per Pack 0. 01 mg L Resolution DPD Method WHY IT WORKS Consistent chemistry for reliable chlorine measurement DPD Reagent Method Uses the EPA approved DPD (N,N diethyl p phenylenediamine) method for free chlorine