2 in stock

Hanna Magnesium Checker® HC – HI783

2 in stock

Purchase this item and get 53 EMA Points



The HI783 Magnesium Checker HC by Hanna Instruments provides a simple, accurate, and affordable way to measure magnesium in saltwater/marine environments. Its color-coded syringes and straightforward testing strips ensure quick and hassle-free measurements, every time. With a digital read out, there is no more struggling to determine colors visually.

-Ideal for saltwater aquariums, marine biology, and aquaculture applications

-Easier to use and more accurate than other chemical test kits

-Color-coded syringes for simple and effortless testing

-Dedicated to a single parameter

-Simple one-button operation

-Large LCD digital read out for added convenience

-Auto shut-off to assure the battery wont be drained

-Compact size for easy travel and storage


  • Range: 1,000 to 1,800 ppm Magnesium
  • Resolution: 5 ppm
  • Precision: ±5% of reading @ 77°F (25°C)
  • Light Source: LED @ 610 nm
  • Light Detector: Silicon photocell
  • Environment: 0 to 50°C (32 to 122°F); max 95% RH non-condensing. Prepared sample cuvette (sample plus reagents) must be 18 to 28 °C (64 to 82 °F).
  • Battery Type: (1) 1.5V AAA
  • Auto-off: After 10 minutes of non-use
  • Dimensions: 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5″)
  • Weight: 64 g (2.3 oz.)
  • Method: Adaptation of the colorimetric EDTA method using calmagite indicator. The reaction between magnesium and the reagents causes a blue to violet tint in the sample.
  • Interferences: Calcium below 300 ppm and above 500 ppm
  • Reagent Set: HI783-25(25 tests)
  • Calibration Set: HI783-11
  • Warranty: 1 Year

What’s Included?

  • (1x) HI783 Marine MagnesiumChecker HC 
  • (1x) Carrying case
  • (1x) Sample cuvette and (2x) caps
  • (1x) Marine Magnesium Starter Kit (reagents for 25 tests)
  • (1x) 1mL graduated syringe and tip
  • (1x) 5mL Syringe and tip with black printing
  • (1x) 5mL Syringe and tip with blue printing
  • (1x) 1.5V AAA Alkaline battery
  • (1x) Instruction manual
  • (1x) Quick reference guide

Additional information

Weight1.1 kg