Product Description
Professional Iron Colorimeter for Aquariums, Pools & Drinking Water TestingThe Hanna HI721 Checker HC is a portable, professional-grade iron colorimeter designed for accurate iron (Fe) measurement from 0.00 to 5.00 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 iron concentration on the easy-to-read LCD display.Key Features:
Precision Iron Testing: Measures iron from 0.00 to 5.00 mg/L (ppm) with ±0.04 mg/L accuracy—ideal for aquariums, pools, drinking water, and low-iron applications
Portable & Handheld: Compact Checker HC design fits in your pocket for on-site testing anywhere
Lab-Quality Results: Advanced photometric technology delivers accurate, repeatable measurements comparable to benchtop instruments
Simple Operation: Easy three-step process—fill cuvette, add reagent, read result—no complex procedures
LCD Display: Large, easy-to-read screen shows iron concentration in mg/L (ppm)
Auto-Off Function: Conserves battery life with automatic shutdown after 10 minutes of non-use
CAL Check: Built-in validation feature verifies meter performance for quality assurance
Complete Kit: Includes meter, sample cuvettes, reagents for initial testing, and carrying case
Technical Specifications:
Model: HI721
Parameter: Iron (Fe)
Range: 0.00 to 5.00 mg/L (ppm)
Resolution: 0.01 mg/L
Accuracy: ±0.04 mg/L ±3% of reading @ 25°C
Method: Adaptation of EPA Phenanthroline method
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: HI721
Barcode: 013088128610
Applications:Essential for aquarium water quality management (preventing algae and fish health issues), swimming pool and spa water chemistry (preventing staining), drinking water quality testing (EPA compliance, well water monitoring), hydroponics nutrient solution monitoring, environmental water testing, laboratory analysis, and any application requiring accurate low-range iron measurement. Perfect for aquarium hobbyists, pool service professionals, water treatment operators, and environmental consultants.What's Included:
HI721 Iron Checker HC
Sample cuvettes with caps (2)
Iron reagents for initial testing
1.5V AAA battery
Instruction manual
Instrument quality certificate
Rigid carrying case
Why Test Iron Levels?Iron testing is critical for multiple applications. In aquariums, excess iron promotes nuisance algae growth and can harm sensitive fish species. In swimming pools, iron causes brown staining of surfaces and water discoloration. In drinking water, iron creates metallic taste, staining of fixtures and laundry, and can indicate pipe corrosion—the EPA secondary standard is 0.3 mg/L. The HI721's low range (0-5 mg/L) is perfectly suited for these applications where iron levels should be minimal.How to Use:
Fill cuvette with 10 mL water sample to line
Add HI721 reagent packet and mix thoroughly
Wait for color development (3 minutes)
Insert cuvette into HI721 Checker HC
Press button to read iron concentration in mg/L
Reagent Availability:Replacement reagents available separately as HI721-25 (25 tests) and HI721-100 (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.
