TECHNICAL SPECIFICATIONFresh water: < 0.5 ppt Brackish water: 0.5 to 30 ppt Saline water (Seawater): 30 to 50 ppt Brine: > 50 pptreference temperature 20 °C length: 175 mmATC: (compensation range 0 ~ 30 °C) GENERAL SPECIFICATIONThis refractometer is a portable, precision optical instrument. It is designed for the measurement of seawater or very low concentrated salt solutions. It measures on two scales - specific gravity and parts per thousand, making you get two readings at the same time in just one test. It is portable and needs no battery, it is easy to learn and use, easier and more accurate than a traditional hydrometer, it is convenient for all people-children and adults, old and young, ideal for aquariums, marine monitoring, agricultural, gardening & educational purposes.
APPLICATIONThe Hand-held Refractometer is a kind of precision optical instrument. Through to provide with a direct reading of the scales, we can easily know the concentration or refractive index of liquids.