ABSTRACT
This chapter discusses a continuation of that effort, which, in many instances, will eliminate the need for classical hydrostatic weighing and most of its inherent difficulties in determining the density of a solid. There is scientific interest in density measurements, at the part per million level of accuracy, of solid samples having a mass in the range of l00 g to a few grams or less. The air density and the spring constant of the detector remain unchanged throughout the measurement, and the detector scale reads zero when the pan is empty both in air and in water. The knowledge of the density of air and water embodies the information that ties the density measurement to the SI units. The dependency of the balance calibration on air density is taken into account. In addition, it is desirable to express the object density at a reference temperature that may be different from that of the measurement.
