This optical Coolant and Battery Refractometer w/ three scales is designed to measure freezing point of coolants & antifreezes based on ethylene glycol & as well as it measures of battery fluid condition & concentration of the ethylene glycol aqueous solution. Scale range: Ethylene glycol: -60 to 0°C and 0 to 100% ; Battery fluid: 1.10 to 1.40 kg/l With this refractometer, you can: * Take care of your flooded battery * Check the strength of electrolyte solution batteries * Measure freezing point of ethylene glycol based cooling systems * Have tool that professional and nonprofessional simply can't be without Just few drops on testing prism,cover, look and read the result! COMMON FEATURES ON OUR REFRACTOMETERS: Auto Temperature Compensation (ATC), increase accuracy & eliminates concerns on temperature Easy to use & calibrate Cushioned w/ soft & comfortable non-slip rubberized grip, insulate test solution from body heat Adjustable & clearly defined scale, w/ large easy-to-read measurements Approved by strict quality & safety standards Specifications Measuring Range: Ethylene glycol: -60 to 0°C Ethylene glycol: 0 to 100% Battery fluid: 1.10 to 1.40 kg/l Division: Ethylene glycol: 5°C Ethylene glycol: 5% Battery fluid: 0.01 kg/l Accuracy: Ethylene glycol: ±5°C Ethylene glycol: ±5% Battery fluid: ±0.01 kg/l Reference Temperature: 20°C ATC range: 10 – 30°C Material composition: Copper & Rubber Item Length: 15.2cm Item weight: 92g Shipping weight: 301g Shipping size: 21 x 9 x 6cm Set Includes 1 x Traditional Battery Antifreeze Cleaning Fluid Refractometer 1 x English Instruction manual 1 x Mini screw driver 1 x Cleaning Cloth 2 x Pipettes 1 x Portable USB LED Light (Power Bank not included in set) 1 x Protective Carrying Case