à¤Ã×èͧÇÑ´¤ÇÒÁà¤çÁ Refractometer RHS-28ATC Item : Handheld Aluminum Salinity Refractometer 0 - 28 % ATC We are dedicated to offer you a wide range of refractometers with the following 3 design categories: Traditional version : Using screw driver for calibration Latest version : Twist directly on the built-in calibration knob for direct calibration (No Screw Driver is required!) Lighted version : Built in LED lighting for testing under an optimal light source at any time, use screw driver for calibration Brief Description This salinity refractometer is designed for testing the concentration of salt water and brine and used for quality control in research and clinical laboratories and marine industry. Its scale provides a direct reading of the specific gravity and concentration (Parts per Thousand) of salt in water. Features: Sturdy and light weighted Aluminum body High quality and accurate testing result ATC Compensation Range (i.e. Built-in Automatic Temperature Compensation System) from 10°C to 30°C Easy and very convenient to use Specification Salinity Test Range : 0 - 28% ATC (Automatic Temperature Compensation System) Latest version : Twist directly on the built-in calibration knob for direct calibration (No Screw Driver is required!) Sturdy and light weighted Aluminum body Item size : approx. 20.5 cm long Item weight : approx 200g 1pc pipette One set included 1pc x Refractometer (main unit as described above) 1pc pipette 1pc x instruction manual Protective fabrics pouch with white box {tortags,951,3}