Hanna Instruments HI-721-11 Cal Check standard for Iron Checker 0.00 and 1.00 ppm
The Iron Checker® HC Calibration Check Set – HI-721-11 provides a simple solution to validating the Iron Checker® HC – HI-721 that has a range of 0.00 to 5.00 ppm (mg/L). This high-quality set of standards is supplied with a Certificate of Analysis.
The HI-721-11 is a calibration checking set for the HI-721 Iron Checker
Hanna optional Checker HC Calibration Sets provide a simple solution to validating your Checker HC. Each high quality set of standards is manufactured in our state-of-the-art facility and comes supplied with a Certificate of Analysis. The certificate of Analysis provides the lot number, reference values and expiry date to provide traceability when certifying the Checker HC.
HI-721-11 is a high-quality set of calibration standards that allows users to validate the Iron Checker® HC – HI-721.
The HI-721-11 includes one sealed cuvette for zero ppm iron and one single-use standard cuvette that becomes tinted to an equivalent 1.00 +/- 0.06 ppm iron sample @ 25°C when the supplied reagent is added. The calibration check set is produced using reagent grade chemicals in a temperature controlled environment.
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.