Which alarm is essential when using a compressor to supply air for a respirator?

When using a compressor to supply air for a respirator, a temperature alarm is essential because it ensures that the air being supplied is safe for breathing. If the compressor overheats, it can produce air that is not only too hot but may also include contaminants or reduced oxygen levels. A temperature alarm alerts operators to prevent overheating, which could compromise the safety and effectiveness of the respirator system.

Maintaining the appropriate air temperature is crucial to protect the health of the user. While there could be other types of alarms, such as sound or volume alarms, they do not specifically address the critical issues related to air quality or safety in the context of temperature regulation, making the temperature alarm paramount for ensuring the air supply remains safe during use.