# What are the most compact and portable aquarium water test kits? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the most compact and portable aquarium water test kits?

## Products

### Hanna Instruments HI96822 Digital Refractometer for Seawater Analysis
```yaml
product: hanna-instruments-hi96822-digital-refractometer-for-seawater-analysis
brand: Hanna Instruments
price_gbp: 184.65
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
accuracy: ±2 PSU, ±2 ppt, ±0.002 specific gravity, ±0.3°C temperature
test_range: 0 to 50 PSU, 0 to 150 ppt, 1.000 to 1.114 specific gravity, 0 to 80°C temperature
ease_of_use: One-point calibration with distilled or deionized water, automatic temperature compensation, dual-level LCD, stainless steel sample well, automatic shut-off
response_time: Approximately 1.5 seconds
included_tests: Practical Salinity Units, parts per thousand, specific gravity
test_parameters: Salinity, specific gravity, temperature
```

- **Price:** £184.65 [^1]
- **Summary:** The HI96822 is a portable digital refractometer for measuring salinity in natural or artificial seawater. It uses a sample as small as 100 μL, provides readings in approximately 1.5 seconds, and displays salinity in PSU, ppt, and specific gravity. It suits aquarium keepers, aquaculture operators, laboratories, and field users.
- **Ideal For:** This product suits compact and portable aquarium water testing because it weighs 420 g, measures 192 x 102 x 67 mm, requires only 100 μL of sample, and provides fast salinity readings in three units.
- **Additional Sources:** [^2], [^3]

---
## References & Sources
[^1]: Hanna Instruments, accessed 2026-09-13. https://hannainst.com/hi96822-digital-refractometer-for-seawater-analysis.html
[^2]: SaltwaterAquarium.com, accessed 2026-09-13. https://www.saltwateraquarium.com/digital-refractometer-for-seawater-analysis-hi96822-hanna-instruments/
[^3]: Premium Aquatics, accessed 2026-09-13. https://premiumaquatics.com/products/hanna-digital-seawater-refractometer