AMTAST Salinity Refractometer Salt Water Tester ATC Automatic Temperature Compensation for Brine Food Industry Seawater 0~28 Scale Range Made of Copper Not Cheap Aluminum

1. Measuring Range: 0~28 % 2. Resolution: 0.20% 3. ATC Compensation Range: 0~30°C 4. Material: Copper 5. Size: 27x40x160 mm (1.06x1.57x6.30 in)   Package Include: 1. Refractometer x1 1. Eyeshade x1 2. Suction tube x1 3. Screw driver x1 4. Carry case x1   TEMPERATURE COMPENSATION The reference of temperature is 20°C. In operation, the temperature should be made according to the correcting table. ATC is mounted with Automatic Temperature Compensation, it has the extra function, it enables user concentrate on measurements without worrying the temperature. Compensation range is 0~30°C.   METHOD OF OPERATION  1.        Prepare: Aim the front end of the refractometer in the direction of a bright light, and adjust the adjusting ring of diopter (5) until the reticlecan be seen clearly. 2.        Calibration: open the cover plate (2), drop one or two drops of distilled water on the prism surface, closed cover plate, press it lightly, then adjust the correct screw (3) to make the light/blue boundary concide with null line. 3.        Measurement: Open the cover plate (2), clean the surface of prism with a piece of soft cotton flannel, Drop 1~2 drops of the solution to be measured. Close the cover plate, and press it lightly, then read the corresponding scale oflight and dark boundary. The reading is the salinity concentration of measured solution. Storage: After measurement, clean the surface of prism and cover plate with moist gauze, and it should be stored carefully.