[:lt]Bendrojo kietumo žemo diapazono (LR) rankinis kolorimetras - HI735[:en]Total Hardness Low Range (LR) Handheld Colorimeter - HI735[:] — Total Hardness Low Range (LR) Handheld Colorimeter - HI735 [:lt]Jūrinio amoniako rankinis kolorimetras Checker HC - HI784[:en]Marine Ammonia Checker HC Handheld Colorimeter - HI784[:] Marine Ammonia Checker HC Handheld Colorimeter - HI784 —

Marine Magnesium Checker HC Handheld Colorimeter – HI783

73.50  + PVM

The HI783 Checker HC provides a simple, accurate and cost – effective way to measure marine magnesium in aquarium and aquaculture applications.
SKU: HI783 Category: Tag:

Available on backorder - This item may take 2-3 weeks to deliver.

The HI783 Marine Magnesium Checker HC is a handheld colorimeter that uses the BeerLambert principle to determine the concentration of magnesium colorimetrically. The HI783 is designed specifically to measure magnesium levels in a saltwater aquarium or in marine biology applications. The 1000 to 1800 ppm range is ideal for coral/fish or fish-only aquarium maintenance. 


Magnesium is the third most abundant ion in seawater, surpassed only by sodium and chloride. Its abundance is critical in the formation of weak ion pairs with carbonate ions. This allows calcium and carbonate ions to be available for uptake by corals and invertebrates. Low levels of magnesium lead to low or unstable levels of calcium and alkalinity. Signs of low magnesium levels include precipitation of calcium as insoluble calcium carbonate and impaired inhabitant growth and health. 

• Ideal for aquariums and marine biology
• Easier to use and more accurate than chemical test kits
• Small size, big convenience



Range   1000 to 1800 ppm Magnesium
Resolution   5 ppm
Accuracy   ±5% of reading @ 25 °C (77 °F)
Light source   Light Emitting Diode @ 610 nm
Light detector   Silicon photocell
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.
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   1.5V AAA Alkaline
Auto shut-of   After 10 minutes of non-use
Dimensions   86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight   64 g (2.3 oz)
Interferences   Calcium below 300 ppm and above 500 ppm
Ordering Information:

HI783 Checker HC is supplied with sample cuvette and cap (2 pcs.), Marine Magnesium reagent starter kit (reagents for 25 tests), 1 mL graduated syringe and tip (1 pc.), 5 mL syringe and tip with black printing (1 pc.), 5 mL syringe and tip with blue printing (1 pc.), 1.5V AAA Alkaline battery (1 pc.), instruction manual, and quick-reference guide.


HI783-25 Reagents for 25 Marine Magnesium tests Price: 18.00 €
HI783-11 Marine Magnesium certified standard kit Price: 20.00 €

*HI783-11 and HI783-25 are sold separately.

Related products