HI783 Marine Magnesium Checker

5.0 (46 items)

Limited Time Sale

Until the end

New $67.99 (tax included) Number of stocks: 1

Used $27.20 (tax included) New Arrivals and Restocks Number in stock: 1

$40.79 cheaper than the new price!!

Free shipping for purchases over $99 ( Details )
Free cash-on-delivery fees for purchases over $99

Other shops (12) $99 ~

See all stores

Please note that the sales price and tax displayed may differ between online and in-store. Also, the product may be out of stock in-store.

New $67.99

Product details

Management number	234758085	Release Date	2026/07/02	List Price	$27.20	Model Number	234758085
Category	Pet Supplies Aquarium & Aquatic Life

Our Marine Magnesium Checker® HC (HI783) is designed to accurately and quickly determine the magnesium level in marine (saltwater) samples. The digital readout makes measurements effortless.

Range: 1,000 to 1,800 ppm Magnesium
Simple test process and procedure
Saltwater Compatible

Our Magnesium Checker^®HC (HI783) is the first marine magnesium test of its kind! This Checker^® provides an uncomplicated, accurate, and budget-friendly way to measure magnesium in saltwater/marine environments. Color-coded syringes and straightforward testing steps ensure quick and easy measurements every time! Magnesium is vital in saltwater environments as it allows calcium and carbonate to be bioavailable for corals and invertebrates. Designed as a more accurate alternative to chemical test kits, our Marine Magnesium Checker^® HC (HI783) provides quick, accurate results in a few easy steps.

Features at-a-glance

Fewer steps than other chemical tests
Color-coded syringes make the magnesium test simple and effortless
Dedicated to a single parameter
Small size, big convenience
Ideal for: Saltwater Aquariums, Marine, and Aquaculture Applications

DOWNLOAD QUICK GUIDE

Magnesium Checker Tips & Tricks for Accurate Measurements

Measure liquids accurately by syringe by drawing up the plunger until the bottom seal of the plunger is at the desired volume mark. Do NOT raise the liquid to the mark as this will give a false high volume. An air gap between the plunger and liquid is normal.
Always use clean, dry cuvettes and syringes/tips. Rinse with deionized (RODI) water only; never rinse with tank water. Dry the cuvettes before use to prevent dilution.
Ensure the sample does not contain any debris.
Whenever the cuvette is placed into the checker, it must be dry outside and free of fingerprints, oil and dirt.
Wipe the cuvette thoroughly with HI731318 microfiber cleaning cloth or a lint-free cloth prior to insertion.
Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.
Do not let the reacted sample stand too long after reagent has been added, as accuracy will be affected.
Discard the sample immediately after the reading has been taken or the glass might become permanently stained.
Keep the tips with their appropriate syringes during measurement. Clean the syringes and tips before storage.

Resources

Specifications

Specification Name	Detail
SKU	HI783
Range	1,000 to 1,800 ppm Magnesium
Resolution	5 ppm
Accuracy @ 25°C/77°F	±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.
Battery Type	1.5V AAA Alkaline
Auto-off	After 10 minutes of non-use
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).*
Dimensions	86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight	64 g (2.3 oz)
Ordering Information	Each HI783 is delivered in a case with custom insert and is supplied with Marine Magnesium reagent starter kit (reagents for 25 tests), Sample cuvette and cap (2 pcs.), 1 mL graduated syringe with tip (2 pcs.), 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, Quick-reference guide.
Reagent Set	HI783-25 (25 tests)
Calibration Set	HI783-11
Warranty	1 year