If contamination—such as moisture, oil, or particulates—is detected, the CNG dispenser may trigger alarms or automatically halt fueling to prevent damage. Contaminants can affect sensors, valves, and nozzles.
Modern dispensers often include filters and moisture traps to minimize contamination. These protective layers help maintain clean gas flow and protect the vehicle’s tank and injection system.
Early detection helps avoid costly repairs and maintains the overall safety and reliability of the fueling process for both station operators and customers.