Yes. Most float switches are, by definition, a simple apparatus. You can install a simple apparatus, like our Kari float switch, in a hazardous location as long as you're wiring intrinsically safe. In other words, the float switch has to be wired to an appropriate safety barrier or isolator. Additionally, our FS-400, FS-410, and FS-500 series float switches, as mentioned above, carry Class I, Division 1 Explosion Proof certifications.
For our more complex FL series, we have a Class 1, Div 1 certification on our FLX model.