NPA-Series NEMA 7 Pressure Switch

The Ashcroft® NPA pressure switch is housed in a NEMA 7/9 explosion proof enclosure to satisfy challenging applications needing high cycle rates with switch functionality. This design incorporates proven thin film technology to trigger a high quality relay, making this an extremely reliable and long lasting switch. This switch is ideal for use with pressure control, shutdown or alarm operations.

Key Features:

  • Multi-turn potentiometers allow easy setpoint and deadband adjustments
  • Switch status indication
  • SPDT 10 amp relay


  • Accuracy: ±0.50% full scale
  • NEMA 3,4, 4X and 13 (IP66); aluminum enclosure
  • Single setpoint
  • Pressure ranges: 60 to 20,000 psi
  • Select process connections
  • Adjustable deadband (as low as 0.5% of full scale)

The NPA pressure switch housed in a NEMA 7/9 explosion proof enclosure is ideal where accurate and reliable pressure measurement are essential:

Process Market :

  • Pipelines

Industrial Market :

  • Machine Tools
  • Injection Molding Machines
  • Presses
  • Pumps
  • Turbines and Compressors
  • Specialized OEM Equipment

Process Applications:

  • Hydraulic Systems
  • High-Cycling