In this paper we describe the use of the open photoacoustic cell (OPC)
to obtain the thermal effusivity of transparent liquid samples. The s
amples used to demonstrate the usefulness of the ope configuration wer
e distilled water, diffusion pump fluid oil, amaranth seed oil, car oi
l, glycerol and some solvent liquids, such as trichloroethylene, isopr
opanol, white gasoline and ethanol.