Ashcroft LD-Series NEMA 4 Differential Pressure Switch

The Ashcroft® LD differential pressure switch is designed for applications requiring high reliability, safety and accuracy.  It's straight forward design facilitates easy field installation and calibration, making it most suitable for pressure control, safety shutdown or alarm operations.

Key Features:

  • Wide selection of switch elements and wetted materials
  • Multiple process connections available
  • Adjustable setpoints from 15%-100% of range
  • Fixed or adjustable deadbands


  • Accuracy: ±1.00% full scale
  • NEMA 4X (IP65) aluminum enclosure
  • Single or dual setpoints
  • Differential pressure ranges: 30" IWD to 400 psid

The LD differential pressure switch is ideal where accurate and reliable pressure measurement are essential:

Process Market:

  • Refineries
  • Chemical and Petrochemical Plants
  • Pulp and Paper Mills
  • Power Plants
  • Steel Mills
  • Water and Sewage Treatment Facilities

Industrial Market:

  • Pumps, Compressors and Turbines
  • Dairies and Breweries
  • Boilers and Burners
  • Reverse Osmosis Systems
  • Filters and Presses
  • Paint Spraying Equipment
  • Specialized OEM Equipment

Medical and Life Sciences Market:

  • Pharmaceutical Plants

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