What scenarios are sensors based on different detection principles suitable for?

Semiconductor sensors are typically used for leak detection, but prolonged exposure to high concentrations of gas can quickly damage them. Catalytic combustion sensors are the most common, but there are no good solutions for detection ranges exceeding 100% LEL. Infrared sensors can detect the entire range from 0-100% VOL, but they are very sensitive to humidity changes and are unsuitable for humid environments. Laser sensors offer excellent performance but are very expensive. The choice of sensor depends on the specific application scenario and requirements.