Free chlorine, ready for your liquid method
Keep routine free-chlorine testing simple with Hanna HI93701-F ready-made liquid DPD reagents. This factory reagent set provides a nominal 300 free-chlorine tests, with bottle lot numbers and expiration dates for traceability. Choose it when you need free chlorine—not a total-chlorine refill—and your exact meter supports the liquid method.
Manufacturer identification photo. Historical label dates are illustrative, not the expiry of the supplied lot; the image is not a current bottle-count or volume declaration.
Match the liquid method before you refill
HI971044 software v1.02 and higher and HI97104 software v1.04 and higher have individually verified liquid-chlorine procedures in their current manuals. Select Chlorine (Liquid), not the powder method. The separate free-chlorine procedure uses a 10 mL sample and a manufacturer-recommended 1-minute reaction; follow the meter tutorial and your approved timer settings.
The manufacturer describes an expected free-chlorine range of 0.00–5.00 mg/L (ppm). That range does not make this a universal photometer reagent: confirm the exact model, firmware and selected method. HI83300 also has a directly verified free-chlorine liquid procedure; use its own instructions. Hanna Germany’s broad regional advisory advises against these liquids on current HI97xxx/HI833xx instruments, conflicting with the current exact-model US-linked manuals. Our claims follow the verified model, software and liquid method—not worldwide series compatibility; check the manual for your instrument and market.
Buy the free-only refill—or plan paired readings correctly
HI93701-F supplies the free-chlorine A-F/B-F reagent system. It does not include HI93701C-T for total chlorine. If your workflow needs both free and total chlorine, the exact HI93701-T liquid set can already deliver sequential free then total readings on HI971044 v1.02+ or HI97104 v1.04+: read free chlorine after 1 minute, then add C-T to the same cuvette and allow 1 additional minute. You do not automatically need both retail sets. The manuals permit A-T/A-F and B-T/B-F interchange only within this named method; the retail kits are not aliases.
Liquid is a method choice, not a powder-pack replacement
HI93701-F is distinct from HI93701-01 and HI93701-03 powder reagents. Match the reagent form to the program on your meter rather than substituting drops for a powder packet. Do not assume support across every HI97-series meter or every chlorine Checker; use the exact-model manual.
What you receive—and what your bench still needs
Order one factory HI93701-F reagent set, with nominal capacity for 300 free-chlorine tests and component identities HI93701A-F and HI93701B-F. A compatible photometer, suitable clean cuvettes, sample and normal testing accessories are separate. This is not a meter, CAL Check standard, or complete total-chlorine kit. Current source text does not establish a factory bottle count or individual bottle volumes, so neither is promised here.
Make the nominal capacity useful in practice
The 300-test rating is the manufacturer’s set capacity, also listed in MAN971044 11/25; it is not derived from the photograph or a guessed bottle size. Repeats, handling loss and expiry can reduce usable tests. For the primary HI971044 liquid method, observe the manual’s sample-below-27 °C guidance and reaction times referenced at 25 °C; do not transfer its settings to another instrument without checking.
Care for the reagents between testing rounds
Keep A-F and B-F in their original, clearly labelled, tightly sealed containers in a dry, ventilated place; avoid overheating and incompatible materials. Protect A-F from moisture and light. Both component SDS identify corrosive hazards: use the specified eye/skin protection and handling and disposal controls. Review the linked US component SDS against the labels supplied with your lot. No shelf-life or stock-lot expiry is guaranteed by the photograph. Hanna US classifies this HI93701-F kit as Dangerous Goods for ground-only shipping; the shared policy’s generic expedited options do not establish eligibility for this kit. Confirm destination and service before ordering.
Frequently Asked Questions
What exactly is HI93701-F?
It is Hanna’s liquid free-chlorine reagent set, nominally rated for 300 tests. Its reagent identities are HI93701A-F and HI93701B-F. The rating is for the set, not 300 tests per bottle.
Will this measure total chlorine too?
Not on its own: the F set does not contain total-chlorine component HI93701C-T. For paired free/total readings, check whether the HI93701-T set and your exact instrument’s sequential liquid procedure meet your needs before buying additional kits.
Do paired free and total readings always need two kits or fresh separate samples?
No. HI971044 v1.02+ and HI97104 v1.04+ document a sequential HI93701-T liquid method: a free reading after 1 minute, then C-T added to the same reacted cuvette for a total reading after 1 additional minute. Separate fresh-sample procedures are also provided. Follow the exact program; do not generalize this to powder methods or other meters.
Can I use it in place of HI93701-01 or HI93701-03 powder?
They are different reagent formats, not interchangeable retail refills. Use HI93701-F only with a verified liquid procedure and the correct method selection. Do not use powder-packet dosing or shaking instructions for this set.
Which model and software should I check?
The current manuals individually verify HI971044 v1.02+ and HI97104 v1.04+ liquid methods; HI83300 has its own verified liquid free-chlorine procedure. Read your model and firmware information, then follow that model’s manual. A similar model name or the HI97 prefix alone does not establish compatibility.
What is included, and are bottle quantities or volumes guaranteed?
One factory HI93701-F reagent set is offered, with the A-F/B-F reagent identities and nominal 300-test capacity. A meter, cuvettes, sample, CAL Check standards and C-T are not included. Current source text does not specify factory bottle quantities or individual volumes; the illustration is not a packing list.
How long is the liquid free-chlorine reaction?
The primary HI971044 separate free-liquid procedure uses a 10 mL sample and a manufacturer-recommended 1-minute reaction. Tutorial mode follows recommended times; SOP-adjusted timers can differ. Timing, sample temperature and handling belong to the exact instrument procedure—use the linked PDF for full dosing and steps.
How should I store it, and does the old photograph show the lot I will receive?
Store in original, sealed, labelled containers in a dry, ventilated place, away from heat and incompatible materials; protect A-F from light and moisture. Follow each component’s SDS. Historical dates in the manufacturer photograph are illustrative, not a statement that current sale stock is expired or a promise of the supplied lot’s expiry. Check the received labels.
