Info on "Electro-Magnets"

Hello, this is my first post. I would like to know if they make an "explosion proof" Electro-Magnet. I work in a coil coating plant. At the coater area, the switches, pumps, lighting, etc... are all "explosion proof" due to the fact that in this area is also paint and thinner and an oven beyond that. I've been reading on web that I could dial in or adjust easily (the voltage) to change the strength of the E.M. at different times to hold different gauges of metal. Thank You.