The RKI Instruments RX-515 is a portable combination gas detector designed to measure the presence of methane, oxygen, carbon monoxide, and carbon dioxide in the air. It features an explosion-proof design, ensuring safe operation in hazardous environments. With its ability to detect various gases, the RX-515 is ideal for industrial settings, confined spaces, and environmental monitoring applications. It provides real-time readings for each gas, allowing users to quickly assess the air quality and take appropriate actions.