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Limit Switches

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Limit Switches Download

SEACON offers a variety of Limit Switches to meet demanding needs. Limit Switches are designed to give a signal to a control system when a moving component like an overhead door or piece of machinery has reached the end point (or limit) of its travel or just a specific point of its journey.

Key Features

  • Load capacities
    • Light duty (LD - 1 amp)
    • Standard Duty (SD - 7 amps)
    • AU series switches are rated to 6,000 psi (4000 m) and available in LD and SD


  • 316 Stainless steel - AU, AU-LSW, AU-LS 10K
  • Titanium - AU, WT-90, AU-LS 10K, AU-LSW



  • AU Series, WT-90, AU-LSW, AU-LS 10K.

Mounting type:

  • 3/4" - 16 UNF for AU
  • Molded cable available for all series
  • Oil filled cable available for AU series

Design Ratings & Testing

  • Pressure Rating:
    • 6,000 psi - AU, WT-90 and AU-LSW
    • 10,000 psi - AU-LS 10K
  • Power load:
    • Light Duty = 1 amp (115 VAC/28 VDC)
    • Standard Duty = 7 amps (115 VAC/28 VDC
  • Minimum cycles: All series greater than 50,000
  • Button options: Large (1.5 in), Medium (.65 in), Small (.375 rad.) - Available for AU and WT-90 series 1.5 and .375
  • Standard temperature range: -65° to +400°F available for AU, WT-90, AUL-SW and AU-LS 10K


  • Full stroke of Plunger:
    • AU series and WT-90 - 0.4 in. (10.2 mm)

Principle Of Operation

A Limit Switch uses a mechanism moving against a spring to move a magnet which is then placed either in attraction or repulsion, to open or close and electrical circuit. All switches are single pole double throw.

Limit Switches

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