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Hanna Instruments

Digital Alkalinity Checker - Hanna Instruments



  • Uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation.
  • Designed for marine aquariums.
  • Dedicated to a single parameter.
  • Small size, big convenience.
  • Ideal for: Aquariums, Environmental, Aquaculture, Water Quality.


  • Hanna Instruments HI 755 Checker HC handheld colorimeter
  • (2) cuvettes with caps
  • Liquid reagent for alkalinity
  • Syringe with tip
  • AAA battery
  • Instructions


Range 0 to 300 ppm
Resolution 1 ppm
Accuracy @ 25°C/77°F ±5 ppm (mg/L) ±5% of reading
Light Source LED @ 610 nm
Light Detector silicon photocell
Method colorimetric method
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type (1) 1.5V AAA
Auto-off after ten minutes of non-use
Dimensions 81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Weight 64 g (2.25 oz.)
Ordering Information HI755 Checker® is supplied with (2) sample cuvettes with caps, alkalinity reagent starter kit for 25 tests (1 bottle of alkalinity reagent), ­­­(1) battery, instructions and quick start guide.
Warranty 6 months

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