Hanna Instruments HI774-11 / 774-11 | Phosphate Ultra Low Range Checker HC Calibration Check Set | Saltwater

Hanna Instruments HI774-11 / 774-11 | Phosphate Ultra Low Range Checker HC Calibration Check Set

Water Type: Saltwater

Validate the accuracy of your HI774 Phosphate Ultra Low Range (ULR) Checker® HC with the HI774-11 Calibration Check Set. This pair of sealed cuvettes (zero + standard) lets you quickly confirm your checker is reading correctly for ultra-low phosphate levels in reef aquariums (checker range 0.00–0.90 ppm as phosphate).

• Designed for the HI774 Phosphate ULR Checker® HC
• Includes two sealed cuvettes: zero and standard
• Standard value: 100 ± 10 ppb phosphorus @ 25 °C
• Reusable with long shelf-life stability
• Supplied with Certificate of Analysis (lot, reference values, expiration)

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FAQ

• Freshwater or saltwater? Saltwater. The HI774 line is built for marine phosphate testing.
• How often should I validate? Every few months or whenever results seem off.
• Do I need it for daily tests? No — this is for calibration validation, not routine testing.