Hach 2537800 Hydrogen Sulfide Test Kit, Model HS-C
- Replacement Purification Pack for Option Q 7/15.
- Designed for easy removal and replacement.
- Contains high-purity nuclear grade ion-exchange resins..
- Recommended change-out is 6 months depending on feed quality and daily usage, or when water quality drops below 18.2Meg-Ohm. Not recommeded to keep in service over 12 months..