Fully functioning instrument, reagents expired 03/26

The HI-781 Nitrate Checker HC is a handheld colorimeter that uses the Beer-Lambert principle to determine the concentration of nitrate colorimetrically.

The HI-781 is designed specifically to measure low levels of nitrate in a saltwater aquarium. The 0.00 to 5.00 range is ideal for reef aquarium maintenance

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 colour and paleness.

Ideal for aquariums and marine biology

Easier to use and more accurate than chemical test kits

Small size, big convenience

The Checker®HC handheld colorimeter is supplied with:

Sample cuvette and cap (2)

Marine Nitrate Low Range reagent starter kit (reagents for 25 tests)

Filter paper (25)

Filter holder (1)

Mixing vial and cap (1)

5 mL syringe with tip (1)

10 mL syringe with tip (1)

1.5V AAA Alkaline battery (1)

Instruction manual

Specifications 

Range:0.00 to 5.00 ppm (mg/L) NO-

Resolution: 0.01 ppm

Accuracy @ 25°C/77°F: ±0.25 ppm ±2% of reading

Light Source: LED @ 525 nm

Light Detector: silicon photocell

Method: zinc reduction method

Auto-off: after ten minutes of non-use

Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing

Battery Type: (1) 1.5V AAA

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.

Accessories: HI781-25 Reagent set for 25 tests, HI781-11 Calibration set

Sku: HI-781