TPA installed sixteen flow meters, of the Positive Displacement (PD) type at the KOJ.
These meters became operational in November 2004. The meters were manufactured by the reputed Smith Meters Inc. of USA. The meters are similar to those used worldwide for the purpose of custody transfer of bulk liquids.

The metering system includes an electronic registration facilitated by the ultra modern Accuload III. During the flow metering process the Accuload automatically makes compensation for temperature and pressure thereby complying to the trade requirements on measuring of volumes at 20 degrees centigrade.
The Tanzania Bureau of Standards (TBS) specifies the densities used to calculate the weights of imported parcels of oils. The densities of the various products imported through the KOJ are entered, stored and protected by a high level security password in the Accuload computer.

The meters are normally recalibrated each year for accuracy and are annually certified by the Weights and Measures Department of the Ministry of Trade. It is worthwhile to note that the metering system installed at KOJ effectively replaced the former Ullage System (Dipstick) that had since been used to estimate volumes of imported oils. The Ullage system was generally not reliable and was prone to abuse.