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Hanna Instruments – HI755 Marine Alkalinity Checker® HC

The HI755 Marine Alkalinity Checker® HC is a handheld colorimeter designed for quick, precise, and affordable seawater alkalinity testing. It provides the carbonate ion measurement needed for coral reef calcium carbonate growth and acts as a pH buffer in marine environments. The device is small, portable, and user-friendly, serving as a more accurate alternative to chemical test kits. With just four simple steps, users can obtain reliable alkalinity results for saltwater applications.

  • Alkalinity Range: 0 to 300 ppm
  • Resolution: 1 ppm
  • Accuracy: ±5 ppm ±5% of reading
  • Applications: Marine aquariums, coral reef monitoring, seawater research

Description

The HI755 Marine Alkalinity Checker® HC is specifically designed for seawater applications where accurate alkalinity measurement is essential. Alkalinity provides carbonate ions for coral growth and acts as a buffer against pH swings, making it critical for maintaining healthy marine ecosystems. The handheld device simplifies traditional chemical test kits, delivering precise results in four easy steps, which is especially beneficial for aquarists, marine biologists, and environmental professionals.

Constructed with LED-based photometry at 610 nm and a silicon photocell detector, the HI755 ensures high accuracy and reliability. It is lightweight, compact, and powered by a single 1.5V AAA battery with an automatic shut-off for convenience. The checker comes complete with two sample cuvettes, a reagent starter kit for 25 tests, battery, instructions, and a quick start guide, making it a ready-to-use solution for marine water alkalinity monitoring.

Features

  • Model: HI755
  • Product Name: Marine Alkalinity Checker® HC
  • SKU: HI755
  • Measurement Type: Alkalinity (seawater)
  • Range: 0 to 300 ppm
  • Resolution: 1 ppm
  • Accuracy: ±5 ppm ±5% of reading
  • Method: Colorimetric method
  • Light Source: LED @ 610 nm
  • Detector: Silicon photocell
  • Battery: 1.5V AAA (included)
  • Automatic Shut-Off: 10 minutes of non-use
  • Weight: 64 g (2.25 oz.)
  • Dimensions: 81.5 x 61 x 37.5 mm (3.2″ x 2.4″ x 1.5”)
  • Ordering Information: Supplied with 2 cuvettes with caps, alkalinity reagent starter kit for 25 tests, 1 battery, instructions, and quick start guide
  • Applications: Marine aquariums, coral reef monitoring, seawater research
  • Key Features: Easier to use and more accurate than chemical test kits, dedicated to a single parameter, small and portable

Specifications

SKU HI755
Product Name Marine Alkalinity Checker® HC – HI755
Quote Required Yes
Seawater Alkalinity Range 0 to 300 ppm
Seawater Alkalinity Resolution 1 ppm
Seawater Alkalinity Accuracy ±5 ppm (mg/L) ±5% of reading
Seawater Alkalinity Method colorimetric method.
Photometer/Colorimeter Light Source LED @ 610 nm
Photometer/Colorimeter Light Detector silicon photocell
Battery Type/Life (1) 1.5V AAA
Automatic Shut-Off after ten minutes of non-use
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Weight 64 g (2.25 oz.)
Dimensions 81.5mm x 61mm x 37.5mm (3.2″ x 2.4″ x 1.5”)
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.

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