The HI-783 pocket checker is a simple and accurate way to measure magnesium.
Remove the Checker HC handheld colourimeter and accessories from the packing material and examine it carefully. If you require any further information, please contact Hanna Instruments’ technical support team. Each HI783 is delivered in a case with a custom insert and 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.)
Note: Save all packing material until you are sure that the Checker HC handheld colourimeter works correctly. Any damaged or defective item must be returned in its original packing material with the supplied accessories.
General Description & Intended Use HI783 Marine Magnesium handheld checker is designed to determine the concentration of magnesium in saltwater aquariums.
HI783 features a single-button operation system and is easy to use.
The large LCD is easy to read and the auto shut-off feature assures the battery will not be drained.
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
Adaptation of the colourimetric EDTA method using
calmagite indicator. The reaction between magnesium and
the reagents cause a blue to violet tint in the sample.
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-off 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 500ppm
* Warm or cool prepared cuvettes if needed.