Ashcroft D-Series NEMA 7/9 Differential Pressure Switch

The Ashcroft® D7 NEMA 7/9 differential pressure switch is designed for applications requiring safety, reliability and long-cycle life. It is ideal for satisfying requirements for pressure control, shutdown or alarm operations.

Key Features:

  • Adjustable setpoint from 15-100% of range
  • Explosion-proof enclosure provides uncompromising protection
  • Fixed or limited adjustable deadband
  • Wide selection of switch element and wetted materials
  • External locking screw (ATEX / IECEx approval only)


  • Accuracy: ±1.00% full scale
  • NEMA 7/9 (IP66) aluminum enclosure
    Epoxy-coated aluminum (standard)
    316 Stainless steel (option XYW)
  • Single setpoint
  • SPDT or DPDT switching option
  • Differential pressure ranges: 10" IWD to 600 psid

The D-Series NEMA 7/9 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
  • Washers and Filters
  • 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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