Hanna Checker - Nitrate LR (NO3) Colorimeter

The HI781 Nitrate Checker LR by Hanna Instruments is a simple and accurate handheld colorimeter that uses the Beer-Lambert principle to determine nitrate concentration.

The HI781`s low range of 0.00 - 5.00 makes it ideal for measuring the low nitrate levels found in saltwater aquariums. 

 Why are Nitrate levels important?

Excess nitrates in a reef system can lead to an overgrowth of undesirable algae and dinoflagellates. Alternatively, not enough nitrates can lead to starvation for SPS and other corals.

 Features

• Low range is ideal for saltwater aquariums
• Easier to use and more accurate than chemical test kits
• Dedicated to a single parameter
• Simple one-button operation
• Digital read out for added convenience

 Specifications

• Range:  0.00 to 5.00 pm (m/L) NO3
• Resolution:  0.01 pH
• Accuracy @ 25°C/77°F:   ±0.25ppm ±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:  HI-781 Checker HC is supplied with sample cuvettes with caps (2), reagent starter set, battery, and instructions
• Accessories purchased separately:   HI-781-25 Reagent set for approx. 25 tests  +  HI-781-11 Calibration set