Wireless Fluid Level Probe Using Inductive Coupling

The patent replaces the mechanical dip stick measurement system with a wireless electromagnetic sensing system. Capacitive sensors detect fluid level through dielectric constant changes, and inductive coupling transfers data wirelessly from the tank interior to exterior antennas, eliminating the need for personnel to physically access the tank and thereby removing exposure to toxic fumes and combustion hazards while maintaining measurement capability

The patent introduces wireless electromagnetic fields as an intermediary medium to transfer measurement data from the tank interior to the exterior. The capacitive sensors inside the tank couple inductively with external antennas through the tank wall, allowing measurement data to be transmitted without physical access to the tank interior, thus maintaining operational ease while ensuring personnel safety by keeping workers outside the hazardous environment

The patent implements a passive sensing system where the capacitive sensors inside the tank require no external electrical power supply. The sensors utilize the natural dielectric properties of the fluid and tank structure to generate measurable capacitance changes. Data is transferred wirelessly through inductive coupling between internal sensors and external antennas, enabling fluid level detection without introducing electrical power sources that could create combustion risks in the hazardous tank environment