Tank gauging apparatus and method

Abstract

Apparatus and method are disclosed for measuring the quantity of a liquid, such as crude oil, transferred to or from a storage tank with all measurements being taken through an opening near the bottom of the tank. A water detecting probe is extendable through the opening a selected distance below the opening in order to detect the presence of water at a selected level below the opening and generate a detection signal. A sampling device is connectable to the opening for taking samples of the liquid transferred to or from the tank. A pressure sensor is connected to the opening for generating a pressure signal indicative of the pressure of the liquid in the tank. A computer is provided for using the pressure signal to generate a level signal indicative of the level of the liquid in the tank. Communication circuitry may be provided for receiving an enabling signal from a remote location and enabling the initiation, measurement, and termination of a liquid transfer and for transmitting the detection signal and the measurements and indications of the liquid transfer to the remote location.

Dependencies are inferred from the claim text.