Cutting Oil Coolant Refractometer is an ideal device that is utilized for checking the concentration of the cutting oil or coolant sample. This type of metering device is extremely resistant to water, and offers high temperature resistance upto 100 oC as well as automatic temperature compensation. The presented device performs with accuracy of +-0.2% Brix/1 oC, and it is equipped with clear TFT display for showing data. It is operated by alkaline batteries, which have life of approx. 11000 measurements. Further, Cutting Oil Coolant Refractometer is easy to operate, compact, portable, lightweight, highly efficient, and comes in different models.