The KENCO Model KEFS uses a float to determine the presence or absence of liquid in a vessel at the process connection. The float arm assembly consists of a float at one end and a magnet at the other. As the level in the vessel rises, the float rises and the magnet falls. The magnet actuates a second magnet on the other side of the pressure boundary. This second magnet causes the switch to change state.
The pressure boundary contains no seals; it is a solid stainless steel barrier that passes a magnetic field, but no liquids. It is impossible for the process liquid to enter the switch enclosure through this barrier. The electrical contacts consist of a microswitch that can be either a single-pole, Double-throw (SPDT) or Double-pole, Double-throw configuration (DPDT). The SPDT Switch is available with either a 5 Amp or 8 Amp current load. The DPDT Switch is only available with a 4 Amp current load.
|Specific Gravity||> 0.53|
|Wetted Parts||Standard||303/304 Stainless Steel|
|Optional||316 Stainless Steel|
|Process Connection Size||Standard||2″ NPT|
|Temperature Range||Standard||-67°F to 257°F (-55°C to 125°C)|
|Process Pressure Range||Vacuum to 2000 psig|
|Switch Types & Ratings||Standard||SPDT; 5A @ 250Vac; 5A @30Vdc restrictive|
|Optional||SPDT; 8A @ 250Vac; 12A @ 12Vac restrictive|
|Optional||DPDT; 4A @ 250Vac; 5A @ 30Vdc restrictive|
|Housing Rating (CSA Certified)||Division 1:
Class I; Groups C&D
|Conduit Connection||1/2″ NPT|