SOBA EX ATEX certified float switch


The SOBA EX is an ATEX certified float switch ideal for hazardous environments 0, 1, 2 (gas) and 20, 21, 22 (dust). As the liquid level reaches the float, the mechanical switch inside the float will tilt, thus closing or opening a circuit connected to an electrical panel. The SOBA EX is equipped with an external adjustable resin ballast, and its +/-25º switching angle ensures a precise level measurement.


  • Double waterproof thanks to its HR HY (High Resistance) housing
  • No maintenance needed, thanks to its biconical shape that avoids any clogging
  • Easy to install, easy to use
  • Ecological float switch (no mercury, no lead)



  • Hazardous areas: 0, 1, 2 (gas) and 20, 21, 22 (dust).
  • Waste water, sewage water, charged liquids
  • Oils, mud, paint, etc.
  • Aggressive liquids : acids, solvents, corrosive liquids, hydrocarbons, sea water, etc...
  • Level control of multiple pumps
  • Emptying / Filling function
  • Overflow or dry-running protection
  • High / low level alarm


 SOBA EX-ATEX CERTIFIED_Technical Data Sheet  (PDF 746Ko)
 SOBA EX- ATEX CERTIFIED_ Wiring Diagram  (PDF 97Ko)
 ATEX certificate  (PDF 1042Ko)


  • It is the customer's sole responsibility to determine whether or not its facility is located in a hazardous area.
  • It is highly recommended to use cable hangers with our float level switches.
  • The SOBA EX float switch must be connected through an instrinsically safe relay


Operation mode Omnidirectionnal
Allowed fluid density 0,80 à 1,10
Maximum pressure 4 bars
Allowed temperature T6 i.e from -20°C to +70°C idem from storage
Protection index IP 68
Power supply

24  VAC/VDC - 10 mA mini or 

and 12  VAC/VDC - 100 mA mini or 

Cut-out power 10(4) A / Protection with an intrinsic safety relay
Housing material

Copolymer polypropylene + HR HY vulcanized

Cable 3 cond. 1 mm²  HR HY
Weight without cable 300 g
Cable weight

 HRHY 110 g/m

Ballast Loaded resin 250 g
Standard cable lenght (serie) 5, 6, 10,13, 15, 20 et 30 m
Tilt level switches
2, avenue des Bosquets
Z.A. de l'Observatoire
78180 Montigny le Bretonneux
telephone+33 (0)1 61 37 35 60
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