Why are dielectric bushings used in the installation of gauges and monitoring devices within steel tanks?

Dielectric bushings are specifically designed to provide electrical insulation between metallic components and conductive materials, such as steel tanks. When gauges and monitoring devices are installed in steel tanks, it is critical to prevent any potential electrical current from flowing between these components and the tank itself. This is because such electrical contacts can lead to galvanic corrosion, compromising the structural integrity of the tank over time.

By using dielectric bushings, the gauges are electrically isolated from the tank, thereby preventing any stray currents that might cause corrosion or faulty readings from affecting the equipment. This insulation not only helps in extending the operational life of the gauges and monitoring systems but also plays a vital role in maintaining the overall safety and integrity of the tank system.