What indicates a high concentration of methane on the CSE 102 detector?

A high concentration of methane on the CSE 102 detector is indicated by a red light. This visual alert system is designed to quickly and clearly convey the presence of hazardous gas levels. The red light signals a warning to the foreman and miners that immediate action may be necessary to ensure safety in the mining area.

In the context of gas detection, different colors or signals often represent varying levels of danger or types of gas. A steady red light effectively communicates a serious situation, allowing personnel to respond appropriately to the presence of methane, which is a highly combustible gas.

In contrast, other options such as a flashing light might indicate a changing situation, a constant beep could serve as a general alert or warning, and a green light typically denotes safe levels of gas or normal operating conditions. The clarity of the red light as an indication of danger is crucial for maintaining safety standards in mining operations.