Handheld, pocket-sized refractometers with a 0-100% (or 0-100 ppt/parts per thousand) salinity range are designed for rapid, accurate measurement of saltwater, marine aquarium salinity, and brine concentrations. These devices typically feature Automatic Temperature Compensation (ATC) for accuracy in varying temperatures.
Key Features and Specifications
Measurement Range: 0-100% (or 0-100 ppt) salinity and often 1.000-1.070 specific gravity (SG).
Accuracy: Generally ±1% or ±1 ppt.
Size: Compact, "pocket-size," usually around 7-8 inches (17-20 cm) in length.
Construction: Durable aluminum body with a rubberized grip.
Mechanism: Uses ambient light (no batteries required for analog models).
Components: Usually includes a calibration screwdriver, pipette, and a carrying case.
