Refractometer

The Sea Side Aquatics Refractometer – Model 211 ATC provides fast, accurate measurement of salinity and specific gravity—essential for maintaining a stable marine aquarium. Whether you keep reef systems, fish-only tanks, or brackish environments, precise salinity control is vital for fish health, coral growth, and system stability.

Engineered with high-quality materials, Automatic Temperature Compensation (ATC), and a clear optical lens system, this refractometer delivers reliable readings in seconds. Ideal for aquarium hobbyists, marine biologists, aquaculture facilities, and laboratory environments.

Comes in a sturdy protective case with all accessories included.

• Measure and monitor salinity in marine aquariums or ponds

• Ensure optimal salt levels for fish, invertebrates, and corals

• Useful in research labs, aquaculture, and marine industry

• ATC ensures accuracy without recalibration when room temperature changes

Model: HT-211ATC

• Measuring Range: 0–10% salinity

• Scale: 1.000–1.070 sg

• Minimum Scale: 0.1% salinity / 0.001 sg

• Size: 30 × 40 × 205 mm

• Weight: 275 g

• Sea Side Aquatics HT-211ATC Refractometer

• Pipette

• Instruction manual

• Sturdy storage/carrying case