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L20-70 D- Polyester housing


  • The Lidec type L20-70D, is specially designed for water ingress detection and offers a dependable solution for detecting the presence of liquids within dry cargos. The Lidec L20-70D is based on the propagation of a surface wave. This design does not include any moving part. The reliability of the device is ensured by a built-in function which monitors electronic or transducer failures.
  • The polyester housing is designed to be installed in areas protected against adverse weather conditions.
    The Lidec L20-70D does not require any calibration as it is not influenced by the surrounding cargo (e.g. coal,
    cement, or any powdery substance).


Technical data:

  • Accuracy: ±2mm
  • Operating temperature: -25°C to +60°C
  • Cargo temperature : up to 70°C max.
  • Intrinsically safe: II 1 G/D EEx ia IIC T5
    II 1 G/D EEx ia IIB T5
  • Power supply: 18 to 28 Vdc (24 Vdc nominal)
  • Protection class:
    IP66 for connecting box
    IP68 for sensor up to 100m depth

Special features:

  • Materials: – Probe: Stainless steel 316L
    – Connecting box : Polyester
  • Horizontal or vertical mounting
  • The L20-70D operates even with cargos that may absorb water to form a past
  • Output signal:
    20 mA (outside liquid)
    7 mA (detection of liquid)
  • Cable length: up to 30m max.