New density data for diethyl adipate (DEA) over 12 isotherms [(293.15 <= T <= 403.15) K] and 15 isobars [(0.1 <= p <= 140) MPa] are reported. This paper presents also the calibration procedure we propose for a new experimental equipment. Data reliability has been verified over the pressure and temperature experimental intervals by comparing our experimental results for toluene and I-butanol with previous literature data. A total of 732 experimental data points have been measured in the framework of this work. The experimental uncertainty is estimated to be +/- 0.5 kg.m(-3) (around 0.05 %). The pressure and temperature dependencies of diethyl adipate densities were accurately represented by the Tammann-Tait equation with standard deviations of 0.3 kg.m(-3). These data were used to analyze the isothermal compressibility and the isobaric thermal expansivity for this fluid.