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Magnetic Float Level Switches

WELMAG-MSM series magnetic side mounted float level switches are economical & reliable snap acting magnetic level switches widely used for HIGH, LOW or INTERMIDIATE point level detection of liquids in all types of vessels.

Installation can be internally or externally by means of External Cage. External cage mounting is preferred where space is limiting factor or mechanical devices like stirrers operate within the tank. In applications like reaction kettles, boilers etc. the isolation can be achieved by using external cage. The switches are normally side mounted, but special applications top mounting installation is preferred e.g. Slurry.


  • Simple Design
  • Operation Without External Power Supply
  • Compact & Rugged Construction
  • Economical & Reliable
  • Due to Magnetic Coupling no scope for Leakages vessel in to switch housing
  • High Temperature / Adjustable Differential Models available
  • Easy for Installation


  • Ambient temperature: −20…+80 °C
  • Process temperature: −50…+250 °C
  • Process pressure: up to 25 bar
  • Output: 250 V AC, 10 A NO/NC
  • Process connection: flanges or 2" thread
  • Ingress protection: IP65, IP68
  • Approvals: ATEX, IEC Ex, INMETRO, DNV (Marine), BV (Marine), SIL 1

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