Density measurement devices are used in many liquid chemical processes. Since Archimedes observed the buoyancy of an object immersed in liquid and calculated that the net force on the object is the difference between the buoyant force and its weight, density has been on of the best ways to determine composition.
Common technologies to measure density include nuclear meters, Coriolis or mass flow effect meters, microwave, and ultrasonic meters. However, all require compensations for the effects of temperature, pressure, vibration, coating, and other conditions. In chemical applications, liquid concentration measurements obtained with a refractometer can be a superior solution, without error from gas bubbles, changes to pressure or velocity, or time to achieve temperature equilibration.
Learn about common density measurement technologies compared with concentration measurements based on refractive index in chemical applications.
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