Professional Low Range Nitrite Colorimeter for Aquariums, Pools & Drinking Water
The Hanna HI707 Checker HC is a portable, professional-grade low range nitrite colorimeter designed for accurate nitrite (NO₂⁻-N) measurement from 0.00 to 0.35 mg/L in aquariums, swimming pools, drinking water, and water quality applications. This handheld photometer delivers lab-quality results in the field with simple operation—just add reagent, insert the cuvette, and read nitrite concentration on the easy-to-read LCD display. Essential for monitoring the nitrogen cycle in aquariums and ensuring safe water quality.
Key Features:
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Low Range Precision: Measures nitrite from 0.00 to 0.35 mg/L (ppm) NO₂⁻-N with ±0.02 mg/L accuracy—ideal for aquariums, pools, and drinking water applications
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Portable & Handheld: Compact Checker HC design fits in your pocket for on-site testing anywhere
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Lab-Quality Results: Advanced photometric technology delivers accurate, repeatable measurements comparable to benchtop instruments
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Simple Operation: Easy three-step process—fill cuvette, add reagent, read result—no complex procedures or color matching
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LCD Display: Large, easy-to-read screen shows nitrite concentration in mg/L (ppm)
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Auto-Off Function: Conserves battery life with automatic shutdown after 10 minutes of non-use
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CAL Check: Built-in validation feature verifies meter performance for quality assurance
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Complete Kit: Includes meter, sample cuvettes, reagents for initial testing, and carrying case
Technical Specifications:
- Model: HI707
- Parameter: Nitrite (NO₂⁻-N)
- Range: 0.00 to 0.35 mg/L (ppm)
- Resolution: 0.01 mg/L
- Accuracy: ±0.02 mg/L ±4% of reading @ 25°C
- Method: Adaptation of EPA Diazotization method 354.1
- Light Source: LED @ 525 nm
- Light Detector: Silicon photocell
- Battery: 1 x 1.5V AAA (included)
- Auto-Off: After 10 minutes of non-use
- Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5 inches)
- Weight: 1 lb
- Country of Origin: Romania
- SKU: HI707
Applications:
Essential for aquarium nitrogen cycle monitoring (new tank cycling, fish health), freshwater and saltwater aquarium testing, pond water quality management, swimming pool and spa water chemistry, drinking water quality testing (EPA compliance), wastewater treatment monitoring, environmental water testing, laboratory analysis, and any application requiring accurate low-range nitrite measurement. Perfect for aquarium hobbyists cycling new tanks, pond owners, pool service professionals, and water quality specialists.
What's Included:
- HI707 Nitrite Low Range Checker HC
- Sample cuvettes with caps (2)
- Nitrite Low Range reagents for initial testing
- 1.5V AAA battery
- Instruction manual
- Instrument quality certificate
- Rigid carrying case
Why Test Nitrite Levels?
Nitrite testing is critical for aquarium health and water safety. In aquariums, nitrite is a toxic intermediate product in the nitrogen cycle—produced when beneficial bacteria convert ammonia (from fish waste) into nitrite, which is then converted to less toxic nitrate. Even low nitrite levels (above 0.5 ppm) are toxic to fish, causing brown blood disease and stress. During new tank cycling, nitrite levels spike before beneficial bacteria populations establish. In drinking water, the EPA maximum contaminant level is 1 mg/L. The HI707's low range (0-0.35 mg/L) is perfectly suited for detecting dangerous nitrite levels in aquariums and ensuring safe drinking water.
How to Use:
- Fill cuvette with 10 mL water sample to line
- Add HI707 reagent packet and mix thoroughly
- Wait for color development (20 seconds)
- Insert cuvette into HI707 Checker HC
- Press button to read nitrite concentration in mg/L
Reagent Availability:
Replacement reagents available separately as HI707-25 (25 tests) and HI707-100 (100 tests). Each reagent packet is pre-measured for consistent, accurate results.
Maintenance & Care:
Clean cuvettes with distilled water after each use. Store in protective case when not in use. Replace battery when low battery indicator appears. Use CAL Check feature periodically to verify meter performance. Keep reagents stored in a cool, dry place.
Note: Reagents sold separately after initial supply is used. For best results, use fresh reagents and follow all testing procedures carefully. Regular CAL Check validation recommended for quality assurance.
