The TIF8800A detectors are MSHA approved and UL Classified. The unique flexible 15 inch stainless probe allows you to access hard to reach places. All feature automatic warm-up and are ideal for a tremendous range of uses and are invaluable for safety in many applications. Instantaneous response and detects dangerous explosive gases. Used in almost any situation where combustible gasses, vapor or residues need to be found. Applications include gas lines and pipes, aids in identifying heat exchanger leaks and hazardous living and working environments. It has an adjustable sensitivity with an audible Geiger counter inch type signal. This is not an effective Carbon Monoxide detector