Brand ATC Hand-held Antifreeze Battery Ethylene Propylene Glycol Refractometer Freezing Point Apparatus With Box         Description:   This models are equipped with °C unit system. With the indication of the percentage we may know the freezing point of either ethylene glycol or propylene glycol-based cooling systems. And they can also be used to test the concentration of ethylene glycol or propylene glycol in antifreeze liquids. There's also an additional scale for measuring the freezing point of windshield cleaning fluid.    Feature:     It's FULLY EQUIPPED with ATC that automatically adjust itself to correct temperature discrepancies during use. Refractive index is very temperature dependent, it is important to use a refractometer with automatic temperature compensation to give you the most accurate measurement in any type of environment temperature. Capable of measuring with high accuracy and provides precise results. It's equipped with vivid and sharp reticle chart for easy and comfortable reading. It uses ambient light only and no batteries are needed. Made by experienced craftsmen and are unlikely to break down Get the RHA-503ATC and be able to measure four main types of Antifreeze/Battery/Cleaning Fluids            Specifications:     Measuring Range:     Ethylene Glycol: -50°C-0°C     Propylene Glycol: -50°C-0°C     Cleaning fluids: -40°C-0°C     Battery Fluids: 1.100-1.400sg           Resolution Factor:     Ethylene Glycol: 5°C     Propylene Glycol: 5°C     Battery Fluids: 0.01sg      (ATC) Temperature Compensation Range: 10°C-30°C     Approved by strict quality and safety standard            Durable and built to last lon      Heavy-duty and lightweight with its aluminum construction      Easy to focus and calibrate      Accurate testing results guarantee      Made with the highest and finest quality of aluminum & rubber that makes it lightweigh      Cushioned with soft & comfortable non-slip rubbe      Extremely easy-to-use and calibrat           Set Includes     1 x Handheld Refractometer     1 x Instruction manual     1 x Mini screw driver     1 x Pipette     Hard plastic cases,with sponge filled     Warranty: 1 years warranty     All our products are manufactured under the strict quality control guidelines     EASY TO USE:     Simply place about 2-3 drops to the prism face, close cover and make sure the glass has no dry spots or air bubbles. Wait 30 seconds to allow the sample to come to ambient temperature and look through the eyepiece while aiming your refractometer at a light source