What kind of locking system must automatic dispensers use?

Automatic dispensers for Compressed Natural Gas (CNG) must employ a locking system that enhances security and controls access to the dispensing equipment. A key, card, or code system effectively fulfills these requirements. This type of locking mechanism provides a reliable method for authorizing users, thereby preventing unauthorized access and ensuring that only trained personnel can operate the dispensers.

The effectiveness of such systems lies in their ability to maintain records of usage, enhance accountability, and facilitate safe and proper operation of the CNG dispensing equipment. Such measures are essential for compliance with regulatory standards and industry best practices.

Alternative locking mechanisms, such as a manual lock, require direct physical action for access, which may lead to unmonitored use or compromise safety. A biometric system, while advanced, may not be practical or necessary for all facilities, making it less favored compared to more traditional user identification methods. The option stating that no locking mechanism is required is not suitable for ensuring the integrity and safety of CNG dispensers, as minimal security measures could lead to misuse and hazardous situations.