Density and refractive index 

Light-weight hand-held refractometers to measure the Brix or refractive index value of products. By merely putting a drop of liquid on the prism, closing the cover plate and pointing towards a light source, you can measure its value. Applications range from the general industry-specific examples include the control of the sugar or alcohol level in food and beverages on the-spot…

This device is used to test the density of liquids. It can be use for test the density of milk, fruit juice, other food liquids; oil products; colours, paints; galvanic baths; pharmaceutical and cosmetics products.