A pH meter is an analytical instrument used to determine acidity or alkalinity of a solution - also known as pH. pH is the unit of measure that describes the degree of acidity or alkalinity. It is measured on a scale of 0 to 14
Alexander Prandtl developed the first centrifuge in 1875 for the separation of cream from milk. Since then, laboratory centrifuge has become one of the critical tools in various scientific and clinical applications.