Hanna (HI701-25) Free-Chlorine Refill for the Hanna HI701 Checker Handheld Colorimeter (Pack of 25)
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.
Consistent chemistry for reliable chlorine measurement
DPD Reagent Method
Uses the EPA-approved DPD (N,N-diethyl-p-phenylenediamine) method for free chlorine detection. The reagent reacts with free chlorine to produce a pink color proportional to concentration.
Wide Testing Range
Measures free chlorine from 0.00 to 2.50 mg/L (ppm) with 0.01 mg/L resolution. Covers residential, commercial, and light industrial water treatment verification needs.
Factory-Sealed Accuracy
Each reagent packet is pre-measured and sealed to prevent degradation. No measuring, no spills, no guesswork. Consistent results from the first test to the twenty-fifth.
Purpose-Built Chemistry
Formulated specifically for the HI701 Checker optical system. Generic reagents or expired packets compromise accuracy. Use Hanna reagents for the precision the meter was designed to deliver.
Designed exclusively for Hanna HI701
The HI701-25 reagent pack works only with the Hanna HI701 Free Chlorine Checker colorimeter. Not compatible with other Hanna Checker models (HI711, HI721, etc.) or third-party meters. Each packet is calibrated to the HI701 optical wavelength and light path.
When to reorder reagents
Reorder Every 3-4 Weeks
If you're testing chlorine daily for pool maintenance, aquarium systems, or water treatment verification, a 25-pack covers roughly one month of monitoring.
Reorder Every 6 Months
For periodic system checks or spot testing after filter changes, a single pack provides about six months of reagents at one test per week.
Keep Sealed Until Use
Store unopened reagent packets in a cool, dry location away from direct sunlight. Once opened, use the reagent immediately. Do not save partial packets.
No Color Matching
Digital readout eliminates subjective interpretation of test strips or drop-count kits
Free Chlorine Only
Measures active sanitizer without interference from combined chlorine or chloramines
Bulk Convenience
Twenty-five tests per pack means fewer reorders and lower per-test cost than singles
Verify Treatment
Confirm carbon filters are removing chlorine or ensure disinfection levels in storage tanks
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.
Consistent chemistry for reliable chlorine measurement
DPD Reagent Method
Uses the EPA-approved DPD (N,N-diethyl-p-phenylenediamine) method for free chlorine detection. The reagent reacts with free chlorine to produce a pink color proportional to concentration.
Wide Testing Range
Measures free chlorine from 0.00 to 2.50 mg/L (ppm) with 0.01 mg/L resolution. Covers residential, commercial, and light industrial water treatment verification needs.
Factory-Sealed Accuracy
Each reagent packet is pre-measured and sealed to prevent degradation. No measuring, no spills, no guesswork. Consistent results from the first test to the twenty-fifth.
Purpose-Built Chemistry
Formulated specifically for the HI701 Checker optical system. Generic reagents or expired packets compromise accuracy. Use Hanna reagents for the precision the meter was designed to deliver.
Designed exclusively for Hanna HI701
The HI701-25 reagent pack works only with the Hanna HI701 Free Chlorine Checker colorimeter. Not compatible with other Hanna Checker models (HI711, HI721, etc.) or third-party meters. Each packet is calibrated to the HI701 optical wavelength and light path.
When to reorder reagents
Reorder Every 3-4 Weeks
If you're testing chlorine daily for pool maintenance, aquarium systems, or water treatment verification, a 25-pack covers roughly one month of monitoring.
Reorder Every 6 Months
For periodic system checks or spot testing after filter changes, a single pack provides about six months of reagents at one test per week.
Keep Sealed Until Use
Store unopened reagent packets in a cool, dry location away from direct sunlight. Once opened, use the reagent immediately. Do not save partial packets.
No Color Matching
Digital readout eliminates subjective interpretation of test strips or drop-count kits
Free Chlorine Only
Measures active sanitizer without interference from combined chlorine or chloramines
Bulk Convenience
Twenty-five tests per pack means fewer reorders and lower per-test cost than singles
Verify Treatment
Confirm carbon filters are removing chlorine or ensure disinfection levels in storage tanks
Original: $55.10
-65%$55.10
$19.29Description
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.
Consistent chemistry for reliable chlorine measurement
DPD Reagent Method
Uses the EPA-approved DPD (N,N-diethyl-p-phenylenediamine) method for free chlorine detection. The reagent reacts with free chlorine to produce a pink color proportional to concentration.
Wide Testing Range
Measures free chlorine from 0.00 to 2.50 mg/L (ppm) with 0.01 mg/L resolution. Covers residential, commercial, and light industrial water treatment verification needs.
Factory-Sealed Accuracy
Each reagent packet is pre-measured and sealed to prevent degradation. No measuring, no spills, no guesswork. Consistent results from the first test to the twenty-fifth.
Purpose-Built Chemistry
Formulated specifically for the HI701 Checker optical system. Generic reagents or expired packets compromise accuracy. Use Hanna reagents for the precision the meter was designed to deliver.
Designed exclusively for Hanna HI701
The HI701-25 reagent pack works only with the Hanna HI701 Free Chlorine Checker colorimeter. Not compatible with other Hanna Checker models (HI711, HI721, etc.) or third-party meters. Each packet is calibrated to the HI701 optical wavelength and light path.
When to reorder reagents
Reorder Every 3-4 Weeks
If you're testing chlorine daily for pool maintenance, aquarium systems, or water treatment verification, a 25-pack covers roughly one month of monitoring.
Reorder Every 6 Months
For periodic system checks or spot testing after filter changes, a single pack provides about six months of reagents at one test per week.
Keep Sealed Until Use
Store unopened reagent packets in a cool, dry location away from direct sunlight. Once opened, use the reagent immediately. Do not save partial packets.
No Color Matching
Digital readout eliminates subjective interpretation of test strips or drop-count kits
Free Chlorine Only
Measures active sanitizer without interference from combined chlorine or chloramines
Bulk Convenience
Twenty-five tests per pack means fewer reorders and lower per-test cost than singles
Verify Treatment
Confirm carbon filters are removing chlorine or ensure disinfection levels in storage tanks
