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Product code: MX-12462
The HI781 Checker®HC (Handheld Colorimeter) is a simple, accurate, and cost-effective way to measure nitrate from 0.00 to 5.00 ppm (as NO3–) in your saltwater aquarium. For samples containing 5.0 to 50.0 ppm nitrate, follow the approved dilution procedure. Nitrate is a by-product of the Nitrogen cycle.
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The HI781 Checker®HC (Handheld Colorimeter) is a simple, accurate, and cost-effective way to measure nitrate from 0.00 to 5.00 ppm (as NO3–) in your saltwater aquarium. For samples containing 5.0 to 50.0 ppm nitrate, follow the approved dilution procedure. Nitrate is a by-product of the Nitrogen cycle. Excessive amounts of nitrates in a reef aquarium can promote the growth of undesirable organisms including algae and dinoflagellates while insufficient amounts can lead to starvation in which SPS and other corals will show signs including the loss of color and paleness. The HI781 Nitrate Checker HC is a handheld colorimeter that uses the Beer-Lambert principle to determine the concentration of nitrate colorimetrically. The HI781 is designed specifically to measure low levels of nitrate in a saltwater aquarium. Features at-a-glance: For use with saltwater samples. More accurate than chemical test kits. Dedicated to a single parameter. Small size, big convenience. No errors with a digital readout. Ideal for aquariums and marine biology applications. For samples containing 5-50 ppm nitrate, follow the dilution procedure. See What Others are Saying Never Going Back Extra Step not a problem for me. More important to get an accurate reading. Have had problems in the past with standard nitrate test kits being wrong. I am never going back. Robert D. Verified Buyer Awesome! Once you get the steps down it’s pretty easy. I love this and I am so glad I have some thing that gives me an accurate measurement. Ben G. Verified Buyer Lots of steps, but more accurate than guessing colors. This removes the guessing game and gives a much more precise number.
| Nitrate Range | 0.00 to 5.00 ppm (as NO 3 – ) |
|---|---|
| Nitrate Resolution | 0.01 ppm |
| Nitrate Accuracy | ±0.25 ppm ±2% of reading @ 25 °C (77 °F) |
| Nitrate Method | Colorimetric method. The reaction between nitrate and the reagent causes a pink/violet tint in the sample. This checker has been developed to work with seawater samples. |
| Photometer/Colorimeter Light Source | Light Emitting Diode @ 525 nm |
| Photometer/Colorimeter Light Detector | Silicon photocell |
| Battery Type/Life | 1.5V AAA Alkaline |
| Automatic Shut-Off | After 10 minutes of non-use |
| Environment | 0 to 50 °C (32 to 122 °F); max. 95% RH non-condensing |
| Weight | 64 g (2.3 oz) |
| Dimensions | 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”) |
| Ordering Information | HI781 Checker HC is supplied with sample cuvettes with caps (2), nitrate reagent starter kit (reagents for 25 tests), filter holder, 10 mL syringe, 5 mL syringe with tip, mixing vial with cap, battery, and instructions. |

Hanna
MX-11176
HI9829-14/15 is for premium quality 10 ppm and 100 ppm (mg/L) Nitrate (as N) calibration standards. It is produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with…