A continuous monitoring of liquid is essential for storage because it allows operators to control the fluid management better and detect contamination and control both temperature and pressure to maintain the health of the storage tanks
Strain gauges are sensing devices that change resistance at their output terminals when stretched or compressed. They are bonded to the surface of a solid material to measure its minute dimensional changes when put into compression or tension.
CMG employs a small bellows to periodically change the tank volume by a small fraction. The resulting change in fluid pressure is measured, and thermodynamic relations are used to compute the volume of gas (and thereby the volume of liquid), assuming that the bellows compresses the entire volume of gas uniformly
Criteria for Sensor Selection Criteria Strains Optical CMG Pressure Accuracy Complexity Energy Required Technology Readiness