Hanna Instruments HI781 – Marine Nitrate Low Range Colorimeter – Checker® HC 🌊🧪
Accurately test ultra-low nitrate levels with theHanna Instruments HI781 Marine Nitrate LR Checker® HC. Also known as theHanna 781, this handheld digital colorimeter helps reef aquarists maintain stable, nutrient-controlled environments for sensitive SPS corals. 🪸🔬
🌿 Designed for Reef Stability
Low-range nitrate testing is crucial for coral health. The HI781 provides precise readings from 0.00 to 5.00 ppm, allowing you to fine-tune nutrient export and feeding in SPS-dominated systems.
🖐️ Digital Accuracy Made Simple
Say goodbye to difficult color charts. With the HI781, add reagent, place the cuvette, and press a button for a fast, accurate digital readout.
🔗 Pairs with HI781-25 Reagents
Works with HI781-25 reagent refills (sold separately), each providing 25 tests per pack.
🔑 Key Features
- Measuresnitrate in saltwater from 0.00 to 5.00 ppm
- ±0.25 ppm ±2% of reading accuracy
- Resolution: 0.01 ppm
- Colorimetric method with clear digital display
- Portable, reef-safe design
- One-button operation
📦 What’s Included
- HI781 Checker® HC Colorimeter
- Two sample cuvettes with caps
- Starter reagent packets (6 tests – HI781-25)
- 1.5V AAA battery
- Instruction manual
Maintain ultra-low nutrient conditions with theHanna HI781 Marine Nitrate LR Checker® HC—trusted by reef keepers for SPS coral success. 🐠🧪
More Information
| Item | Hanna Instruments Marine Nitrate LR Checker HI781 |
| Model Number | HI781 |
| Measurement Range | 0.00 to 5.00 ppm (Nitrate) |
| Resolution | 0.01 ppm |
| Accuracy | ±0.25 ppm ±2% of reading |
| Testing Method | Colorimetric Method |
| Battery Type | 1.5V AAA |
| Auto Shut-Off | After 10 minutes of non-use |
| Application | Marine/Reef Aquariums Only |
| Reagent Required | HI781-25 (25 Tests per Pack) |
| Features | Digital Display, Reef-Safe, Portable |
| Availability | In Stock/Restockable |
Need more tests? Get the HI781-25 reagent refill pack or explore the full Hanna Instruments collection atSqueaky’s Aquatics!
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