Abstract: A system which enables the measuring, testing and accounting for a fluid, preferably oil, as stored in a tank battery adjacent a producing oil well system. In its most basic form, the system includes a master control unit associated with a level transducer for each tank, basic sediment and water monitors for various conduits within the system, temperature sensors for each tank and the various conduits, and a data collection box for transferring data stored in the master control unit after a predetermined amount of time has transpired. Several options are available with this system and these include telemetry options for remote reporting of the various parameters of the system and various alarm and theft prevention devices.