AT 120 HR HY


The AT 120 HR HY is a heavy duty float level switch designed for aggressive liquids. This float is encased in a HR HY (High Resistance) press-vulcanised housing, which ensures a double waterproof. The AT 120 HR HY can be connected directly to pumps up to 1.5 HP or through a relay if working with high power pumps. Its wide switching angle of 120º protects the pump’s engine and the electrical panels from jerking, specially when dealing with very agitated liquids.


  • Aggressive liquids : acids, solvents, corrosive liquids, hydrocarbons, sea water, etc…
  • Emptying / Filling function
  • Overflow or dry-running protection
  • High / low level alarm



  • +/- 120º switching angle that protects the pump’s engine from jerking
  • Double waterproof float switch encased in a vulcanized HR HY (High Resistance) housing
  • High compatibility with most aggressive liquids

Technical characteristics

  • Switching angle: +/- 120º
  • Maximum pressure: 4 bars
  • Cut-out power: 20 (8) A (20A resistive – 8A inductive)
  • Allowed fluid density: From 0.80 to 1.10
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