Hanna Marine Magnesium Checker® HC

The first Magnesium test of its kind for saltwater aquariums, our Marine Magnesium Checker® HC (HI783) is just what every reef tank owner needs. Struggling with test kits is now a thing of the past. Stop guessing or interpreting a color change by eye. Get a fast, accurate digital read-out every time. Perfect for testing and measuring Magnesium levels in saltwater aquariums, reef tanks, and other marine and aquaculture applications. Easy-to-read, instant digital results Small, convenient portable size User-friendly, simple directions and steps Saltwater compatible Dedicated to a single parameter Range: 1000 to 1800 ppm Magnesium Determines the concentration of Magnesium colorimetrically using the Beer-Lambert Principle One-button operation A great alternative to chemical test kits Color-coded syringes for hassle-free testing Auto shut-off conserves battery energy Large LCD screen with digital read-out   Specification Name Detail SKU HI783 Range 1000 to 1800 ppm Magnesium Resolution 5 ppm Accuracy @ 25°C (77°F) ±5% of reading 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 shut-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 22 to 28 °C (72 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) Reagent Set HI783-25 (25 tests) Calibration Check HI783-11 Warranty 1 year   Testing Tips Measure liquids accurately using a 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. Clean, dry cuvettes should always be used to prevent dilution. Whenever the cuvette is placed inside the checker, it must be completely dry on the outside and free of any fingerprints, oil or dirt. Wipe the cuvette thoroughly using our microfiber cleaning cloth or a lint-free cloth prior to insertion. The syringes and tips should be clean and dry as well. Do not rinse with tank water. Rinse with deionized (RODI) water only. Keep the tips with their appropriate syringes during measurement. Ensure the sample does not contain any debris. Shaking the cuvette can generate bubbles and this can cause higher readings. To obtain accurate measurements, remove any bubbles by swirling or gently tapping the cuvette. Do not let the reacted sample stand too long after the reagent has been added as this could affect the accuracy of results. Discard the sample immediately after the reading has been taken or the glass may become permanently stained. Clean the syringes and tips before storage.