Ashcroft D-Series NEMA 4X Differential Pressure Switch

The Ashcroft® D4 Differential Pressure Switch is designed for use on most applications requiring reliability and long-cycle life. Ideal for satisfying requirements for pressure control, shutdown or alarm operations.

Key Features:

  • Adjustable setpoints from 15%-100% of range
  • Fixed or limited adjustable deadband
  • Wide selection of switch elements and wetted materials
  • Specials designs for NACE applications
  • Internal set point lock screw


  • Accuracy: ±1.00% full scale
  • NEMA 4X (IP66) epoxy coated aluminum enclosure
  • Single setpoint
  • SPDT or DPDT switching option
  • Differential pressure ranges: 10" IWD to 600 psid

The D4 Differential Pressure Switch is ideal where accurate and reliable pressure measurement are essential:

Process Market:

  • Offshore Oil Rigs
  • Chemical and Petrochemical Plants
  • Pulp and Paper Mills
  • Power Plants
  • Steel Mills
  • Water and Sewage Treatment Facilities

Industrial Market:

• Pumps, Compressors and Turbines
• Boilers and Burners
• Degreasers and Evaporators
• Recovery Systems
• Reverse Osmosis Systems / Filters
• Food Processing
• Ground Support Equipment
• Hydraulic and Lubrication Systems
• Heating and Air Conditioning
• Marine Equipment
• Specialized OEM Equipment

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