... explosive gases, and/or 20 area,Zone 21, 22 area in which combustible dust place;2. Temperature classes: T1 ~ ... Indoor, outdoor (IP65, IP66 * when ordering need to put forward);4. Used in the chemical, oil, oil, Marine oil platform, tankers ... high-pressure electrostatic plastic-sprayed surface, stainless steelExposed fasteners;2. Steel tube or cable wiring. dLXK-Series Explosion-proof Travel Switch