Hanna Instruments HI721-11 / 721-11 | Iron Checker HC Calibration Check Set | Aquarium Testing

Hanna Instruments HI721-11 / 721-11 | Iron Checker HC Calibration Check Set

Validate the accuracy of your HI721 Iron Checker® HC with the HI721-11 Calibration Check Set. This set provides a simple, reliable way to ensure your colorimeter is producing accurate readings. Each set includes one sealed cuvette for zero iron (blank) and one sealed cuvette for a known iron standard value, helping you verify your device is properly calibrated.

• Designed specifically for the HI721 Iron Checker® HC
• Includes two sealed cuvettes: zero iron and standard iron solution
• Standard value: 1.00 ± 0.06 ppm iron at 25 °C
• Reusable with long shelf life stability
• Supplied with a Certificate of Analysis
• Lot number, reference values, and expiration date printed for traceability

More Information

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FAQ

• Do I need this for regular testing? Not for routine tests — this is for validating accuracy and calibration.
• How often should I validate? Recommended every few months or whenever accuracy is in doubt.
• Can I reuse the cuvettes? Yes, they are stable and reusable for multiple validation checks.