PAL-Coffee Pocket Refractometer is a handheld instrument particularly utilized in the coffee industry for the measurement the concentration of Total Dissolved Solids (TDS)/dissolved solids in brewed coffee. This easy-to-use provides accurate and quick measurements of coffee quality and strength. It functions by determining the degree to which light is bent, when passing through a specimen of brewed coffee. The refractive index is simply proportionate to the concentration of TDS/dissolved solids in the coffee, like coffee grounds and varied other organic compounds. Besides, regular cleaning and calibration of the PAL-Coffee Pocket Refractometer are needed to guarantee precise and reliable measurements.