Float Switch FAQs

Yes, and they come in several shapes and sizes. Our Explosion Proof FS-400, FS-410, and FS-500 (vertical, miniature vertical, and horizontal, respectively) stainless steel float switches are single-float, single-point, stem-mounted float switches. The FT-100 series is a simple cable suspended float switch with one switch point. Our MLS model is a tank-mounted switch on a rod and can be easily adjusted to get the right level. Finally, our LF models are miniature switches that are tank mounted as well. They're meant to be installed right at the switching level.

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.

Simple, buy a Kari float switch. It has up to 4 switches in a single float. So you can have a high and low switch point with a high and low alarm, or you can have 4 individual switching levels in a single float.

You can also get a Kari model with 1, 2, and 3 switches in them. They come in 19 different configurations - including built-in hysteresis - for multiple pump control and alarming applications.

That depends on your definition of high temperature. The High Temperature (HT) lines of the FS-400, FS-410, and FS-500 are rated up to 500° F, while some of our miniature LF models can operate in temperatures up to 390° F. Our FL series maxes out at 212° F. Our cable suspended models can only do 140° F.

Yes, on a few of them. The FS-400 and FS-410, along with certain models of our miniature line (LF series) allow you to flip the float to change the NO/NC state. The FS-500 can be changed from NO to NC (or vice versa) by continuing to rotate it 180° when installing it.

Yes. The float can be moved up and down the rod to adjust the switch point. Simply move the float stops. You can also cut the rod to size.

Yes, until you reach the limitations of the mounting threads. Cable suspended float switches do not come with mounting threads. They're intended for non-pressurized environments.