Hanna HI781 Nitrate LR checker (Marine)

Hanna HI781 Nitrate LR checker measures nitrate in the range of 0-5ppm (0-50ppm after dilution) in marine water

Nitrates in nature are the result of the decomposition of organic microorganisms or the use of fertilizers. Nitrate that is reduced to nitrite, which in turn easily binds to form substances dangerous to humans and animals. A maximum level of 45 mg / l has been set worldwide for the concentration of nitrate in water. The HI781 Checker is a simple, accurate and cost effective way to determine nitrate in seawater.
Developed as the accurate alternative to chemical test kits, the Hanna Instruments Checker provides fast, reliable measurement results in a few simple steps. The checkers are designed in such a way that they are comfortable to hold, easy to carry and easy to read because of the large display.

• More accurate than chemical test kits
• Practical pocket size
• Clearly readable display
• Simple one-button operation
• Automatic shutdown
• Operates on a single AAA battery

Specifications HI781

• Application: sea water
• Range 0.00 to 5.00 ppm (NO3) and 0-50ppm after dilution with nitrate free seawater (NOT included)
• Resolution 0.01 ppm
• Accuracy ± 0.25 ppm ± 2% of reading at 25 ° C
• Light source LED at 525 nm
• Light detector silicone photocell
• Method colorimetric
• Environment 0 to 50 ° C, RH max. 95% non-condensing
• Battery 1 x 1.5 V AAA
• Automatic shut-off after 10 minutes of non-use
• Dimensions 86.0 x 61.0 x 37.5 mm
• Weight 64 g

If you want to use the HI781 nitrate test for a measurement of nitrate above 5ppm, you can dilute the water to be tested with nitrate-free seawater. You can make this by mixing osmosis water with a little sea salt

Explanation for measurements above 5ppm