Refractometer

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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. Usage 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 Set Includes Sea Side Aquatics HT-211ATC Refractometer Pipette Instruction manual Sturdy storage/carrying case Show more