What is one of the methods of gas detection mentioned?

Oxygen testing is a method of gas detection that is crucial in various environments, especially in mining and confined spaces. This technique involves measuring the concentration of oxygen in the air to ensure it is within safe limits for workers. In environments where combustion can occur, or where respiration is necessary for survival, monitoring oxygen levels is vital. Low oxygen levels can indicate hazardous conditions, prompting safety measures to be implemented.

In contrast, while electrical testing, pressure testing, and temperature measurement are valuable techniques in various applications, they do not specifically relate to the detection of gases in the same way that oxygen testing does. Electrical testing focuses on the integrity of electrical systems, pressure testing evaluates the strength of pressure vessels, and temperature measurement tracks heat levels, none of which provide direct information about the presence or absence of gases in a given environment.