Self calibrating flow rate and tank level measurement system

Abstract

A tank level and flow rate measurement system and method is described for use with a chemical injection pump and a chemical storage tank. The system includes a device comprising a measurement column of known volume, an upper pressure sensor and a lower pressure sensor, a valve for controlling fluid filling of the device from the storage tank, and a fluid outlet connected to the pump, a vent tube which extends above the measurement column and the upper pressure sensor; and a controller operably connected to the upper pressure sensor and the lower sensor, configured to receive pressure measurements and determine a base state where both upper and lower sensors read atmospheric pressure only and a measurement state where the upper sensor reads atmospheric pressure only and the lower sensor reads a pressure based on fluid level in the measurement column.

Dependencies are inferred from the claim text.