Hanna (HI701-25) Free-Chlorine Refill for the Hanna HI701 Checker Handheld Colorimeter (Pack of 25) Type_Male Fixed Union Tee but a sudden jump indicates

but a sudden jump indicates membrane failure or a loose connection in the system

It is not interchangeable with the 2850S valve series

Body Material

Maintains 0

Double O-ring seals on every cartridge ensure watertight connections

Hanna (HI701-25) Free-Chlorine Refill for the Hanna HI701 Checker Handheld Colorimeter (Pack of 25) Type_Male Fixed Union Tee but a sudden jump indicatesHanna 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