Handheld Refractometer Sea Salt Salinity Meter 0–10% (available with or without box) reading mode Why choose a Gull Wing

Why choose a Gull Wing design

IP67 waterproof and dustproof: Marine‑rated protection means it can weather rain

If you value a space-saving design without sacrificing performance or serviceability

Whether you're kayaking

go-anywhere icebox you can rely on for days of cool refreshments

Handheld Refractometer Sea Salt Salinity Meter 0–10% (available with or without box) reading mode Why choose a Gull WingThe Optical Salinity Refractometer is a precision tool for measuring salt concentration and density in seawater, aquariums, brine solutions, and low sugar liquids. With an ATC feature, it delivers reliable readings without being affected by temperature changes. Ideal for aquarium hobbyists, mariculture breeding, laboratories, and food & beverage industries, this refractometer helps ensure marine life health, optimize fluid concentrations, and improve