The HI736 Phosphorus Ultra Low Range Checker HC is a specialized handheld colorimeter designed for accurate and cost-effective phosphorus measurement in marine environments, including reef tanks. This instrument provides an easy-to-use alternative to traditional chemical test kits with its dedicated focus on phosphorus levels, ensuring precise readings within the 0 to 200 ppb range. Featuring a small, portable design, it includes LED light technology for reliable detection and silicon photocell sensors for accurate measurement. The HI736 is ideal for aquarists who need to monitor phosphorus levels closely to prevent excessive algae growth, maintain healthy oxygen levels, and protect fish and aquatic life from harmful conditions.
| Range | 0 to 200 ppb |
| Method | adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, Ascorbic-Acid method |
| Weight | 64 g (2.25 oz.) |
| Auto-off | after three minutes of non-use and two minutes after reading |
| Warranty | 6 month limited warranty |
| Dimensions | 81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”) |
| Resolution | 1 ppb |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing |
| Battery Type | (1) 1.5V AAA |
| Light Source | LED @ 525 nm |
| Light Detector | silicon photocell |
| Ordering Information | HI736 Checker® is supplied with (2) sample cuvettes with caps, phosphorus ULR reagent starter kit for 6 tests (6 powder reagent packets), battery, instructions and quick start guide. |
| Accuracy @ 25°C/77°F | ±5 ppb ±5% of reading |
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HI736 Phosphorus Ultra Low Range Checker HC (Saltwater)
by Hanna Instruments
Test Kits
Reference reading: Species guide on Codexery
Species guides on Codexery
- Zoanthus sociatus — Scientific name: Zoanthus sociatus · Common name: green sea mat, button polyp source
- Sarcophyton glaucum — Scientific name: Sarcophyton glaucum · Family: Alcyoniidae source
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