Abstract
The density of LPG (liquid petroleum gases) was measured by vibrating density meter. This meter has a spool as the sensor that vibrates like a bell and its frequency depends upon the density of the sample fluid surrounding the spool.
The feature of this device is the mechanical strength because the fluid is filling up inside and outside of the spool and the performance is not influenced by a high pressure.
The vibrating density meter was calibrated by some liquid such as water, benzen, ethylalcohol, etc, whose density had been determined by using a pycnometer.
The density of liquid petroleume gases was measured by this meter. The experimental values obtained at 20°C were 578.3kg/m3 for n-butane (purity: 99.68%) and 500.3kg/m3 for propane (purity: 99.66%) respectively. They agree well with the values measured by hydrometers and hydrostatic method with the accuracy better than 0.2kg/m3.
