This chapter describes the basic instruments used in a biochemistry laboratory, which are test tubes, test tube holder, test tube stand or rack, bunsen burner, spirit lamp, beaker, pipettes, funnel, reagent bottles, measuring cylinder or graduated cylinder or mixing cylinder, urinometer, balances, centrifuge, water bath, magnetic stirrer or magnetic mixer, hot air ovens, pH meter, colorimeters, and automatic chemistry analyzers. Test tubes are also known as culture tubes or sample tubes. They may be made up of glass or plastic. It varies in sizes from 5–30 mL capacities. The bottom of a test tube may be flat, round or conical. Test tube holder is used to hold or support test tubes containing chemicals to perform tests. A spirit lamp is like an ordinary lamp, but it uses ethanol, i.e. ethyl alcohol as a fuel. Magnetic stirrer or magnetic mixer is a laboratory device that employs a rotating magnetic field to cause a stir bar immersed in a liquid to spin very quickly, thus stirring it.