Product description Glycol antifreeze freezing point: -50 ~ 0 , the division value of 1 Freezing point of the propylene glycol antifreeze: -50 ~ 0 , the division value of 1 Specific weight of the electrolyte: 1.10-1.40, index value 0.01. (1.15 ~ 1.20 need to charge; 1.20 ~ 1.25 enough power; 1.25 ~ 1.30 enough power) Glass cleaning fluid freezing point. -40 +0 , division value of 5 Contain: 1 * refractometer 1 * screwdriver 1 * manual 1 * cleaning cloth ACCURATE MEASURINGThe hand-held refractometer is made according to the different refractive index of the liquid, so the refractive index is very accurate. WIDE APPLICATIONSThe antifreeze refractometer has a wide range of applications and is suitable for most liquid sugar tests. Suitable for Home Brew Beer Wort Dual Scale Automatic Temperature Compensation. EASY TO USE AND CARRYThe antifreeze refractometer is small in size, easy to carry and store, easy to use, and excellent in performance.The operation method of the antifreeze refractometer is simple and easy to understand, which is convenient for you to use. HIGH SAFETY FACTORThe handheld refractometer has passed strict quality control and quality assurance, and has a high safety factor, so it can be used with confidence.