Which devices are commonly installed to monitor the performance of vapor recovery systems?

Flow meters and pressure gauges are essential devices installed to monitor the performance of vapor recovery systems. Flow meters measure the volume of vapor being recovered, ensuring that the system is operating efficiently and effectively capturing vapors that would otherwise be released into the atmosphere. Pressure gauges, on the other hand, provide crucial information about the pressure within the vapor recovery system, helping to identify any issues such as blockages or leaks that could impair the system's performance. By continuously monitoring these parameters, operators can ensure compliance with environmental regulations and maintain optimal operation of the vapor recovery systems.

Other options, while related to various functions and safety aspects in fueling operations, do not specifically target the performance monitoring of vapor recovery systems in the same direct manner. For instance, temperature sensors and pressure relief valves primarily focus on safety and operational integrity rather than specific monitoring of vapor recovery efficiency. Vapor pumps and fuel dispensers contribute to the overall system but do not provide direct monitoring metrics for vapor recovery effectiveness. Liquid level indicators and alarms are important for managing liquid storage but do not directly measure vapor recovery performance.