RFS Level Switch

Brand: KOBOLD Instruments, Inc.

The KOBOLD level switches RFS are designed for monitoring filling levels of liquids cost-effectively. The liquid must not contain solids nor metallic particles. A pivoted stainless steel float with an inserted solenoid moves up and down together with the filling level of the liquid.

The solenoid switches a reed contact. Depending on the mounting position of the device, the contact works as N/O or N/C contact with rising filling level. The devices are delivered for direct lateral mounting in commercially available sleeves.


Ambient Temperature Range

  • -20° to 80° C (-4° to 176° F)


  • Monitoring Filling Level of Liquids

Approvals & Certifications

  • ATEX
  • Ex II 1 GD Exia II CT6
  • Ex II 2/1D ExtD

Connection Material

  • 304L Stainless Steel

Electrical Connectors

  • Aluminum Housing Connection
  • DIN Plug

Electrical Contacts

  • Bistable Reed Contact
  • Normally Closed
  • Normally Open

Electrical Rating

  • Maximum

Enclosure / Body Material

  • Aluminum - RFS-1201 N4 & RFS-12Ex N4
  • Plastic - RFS-1200 N4

Environmental Protection

  • IP65

Materials of Construction

  • 304L Stainless Steel - Float

Mounting Position

  • Horizontal

NPT Connection

  • 1/2" NPT Male

Operating Pressure

  • Maximum

Plug Material

  • Aluminum
  • Plastic

Process Temperature

  • -40° to 120° C (-40° to 248° F)


  • Maximum

Switch Type

  • Normally Open or Normally Closed

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