How is leakage from a gas cylinder typically detected?

Leakage from a gas cylinder is typically detected by using soap solutions to check for bubbles. This method is effective because when the soap solution is applied to a potential leak, the gas escaping from the cylinder will create bubbles, indicating the presence of a leak. The formation of bubbles signifies that gas is escaping from the cylinder, making this a reliable and widely used technique in various settings, including industrial and laboratory environments.

While other methods, such as smelling for gas odors or listening for hissing sounds, can sometimes provide clues to the presence of a gas leak, they are not as definitive or safe as using soap solutions. Visual inspections alone may not reveal leaks that are not readily visible, and relying solely on smell or sound may lead to dangerous situations since certain gases can be colorless and odorless. Therefore, using a soap solution is the most accurate and safest approach to detect leaks from gas cylinders.