FS 90 Float Switch

Contegra's FS 90 is an environmentally friendly, non-mercury, 5-1/2" diameter, Direct Acting Float Switch that's made of Type 316 stainless steel.   FS 90 is a rugged, reliable raw sewage or sewage wet well, point-level sensing device.  It is well-suited for use in a process sump or water reservoir sensor where its simplicity of operation, quality, and ruggedness provide years of reliable service.

September 2021:  The 'coating' on the exterior of the FS 90 float has changed.  The Laminex(TM) coating has changed to polished stainless steel (i.e. the float ball is uncoated and has a mirror-like finish).          

Intrinsic Safety:

UL considers float switches, such as the FS 90, to be a 'Simple Apparatus'.  Such switches must be protected by an Intrinsically Safe barrier such as Contegra's ISBFS2/Ua dual-channel IS Barrier.

The capacitance and inductance of the cable are as follows:

Capacitance:                 25pF/ft @ 1kHz NOM
Inductance:                    0.2µH/ft @ 1kHz NOM

Note:  The above figures are provided by the cable manufacturer.  These are calculated values measured conductor-to-adjacent-conductor.  The values are unvalidated nominal calculations, with the high-strand bunched-copper used in the FS 90 cable, the capacitance and inductance may vary based on how the copper is laying up.

Literature

FS 90 Sales Literature:     Datasheet
          FS 9X Cable Mounting Clip:     Datasheet
          FS 9X Pipe Mounting Clip:     Datasheet
          FS 9X Pipe Wall Mounting Bracket:     Datasheet
          FS 9X Intrinsically Safe Barrier     Datasheet

          Call Contegra for other mounting options.