Digital Handheld Refractometer is widely used in petroleum, chemical, pharmaceutical and sugar industries for measuring refractive index nD of transparent and semitransparent liquid. Apart from this, this instrument also used or measuring sugar solution and correct the effect of temperature on the Brix automatically. Further, Digital Handheld Refractometer is known for their unique features like fully automatic measuring system, touch screen display, easy clean prism and simple operation and display the temperature of sample.