Which device should NOT be disregarded in terms of LP Gas safety?

Overfilling prevention devices play a crucial role in propane gas safety because they are specifically designed to prevent the tank from being filled beyond its safe capacity. This is important because overfilling can lead to dangerous situations such as leaks or explosions due to excess pressure caused by the gas expanding. These devices are essential to ensure that propane tanks operate within their designated limits, providing an essential layer of safety for users.

In contrast, while pressure gauges, temperature sensors, and flow restrictors are important components, they serve different purposes that do not directly relate to preventing the risks associated with overfilling. Pressure gauges monitor the pressure within the system, temperature sensors help in monitoring conditions that could affect gas behavior, and flow restrictors limit the amount of gas that can flow through the system. However, if a tank is overfilled, those measures cannot mitigate the immediate danger posed by the excess liquid propane. Thus, neglecting the significance of overfilling prevention devices would compromise the overall safety of propane handling and usage.