NPI-Series NEMA 4 Pressure Switch

Brand: Ashcroft Inc

The Ashcroft® NPI indicating pressure switch was designed 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.

Specifications:
  • 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) 
Features
  • Digital Indicating Display 
  • Incorporates thin film sensor technology 
  • Multi-turn potentiometers allow easy setpoint and deadband adjustments 
  • Switch status indication 
  • SPDT 10 amp relay 

Specifications

Cone & Thread Connection

  • 1/4” AMINCO Female

Power Requirement

  • 110 Vac, 50/60 Hz
  • 24 Vdc
  • 250 Vac, 50/60 Hz

Set Point - Increasing

  • bar: 4.137 to 1,379
  • kPa: 413.7 to 137,900
  • psig: 60 to 20,000

Compensated Temperature

  • -29° to 71° C (-20° to 160° F)

Zero Offset

  • ± 1.0% of Full Scale

Pressure Range

  • bar: 4.14 to 1,378
  • kPa: 413.7 to 137,895
  • psig: 60 to 20,000

Pressure Type

  • Gauge

Environmental Protection

  • IP54
  • IP66
  • NEMA 13
  • NEMA 3, 4, 4X, 13 / IP54, 66
  • NEMA 4
  • NEMA 4X

Storage Temperature

  • -53° to 121° C (-65° to 250° F)

Enclosure, Body Material

  • Aluminum

Mounting

  • 2” Pipe Mounting Bracket

Proof Pressure

  • bar: 8.27 to 1,654
  • kPa: 827.37 to 165,474
  • psig: 120 to 24,000

NPT Connection

  • 1/2” NPT Male
  • 1/4” NPT Female
  • 1/4” NPT Female & 1/2” NPT Male Combination
  • 1/4” NPT Male
  • 1/8” NPT Female
  • 1/8” NPT Male

Electrical Connectors

  • 3/4” to 1/2” Conduit Reducing Bushing
  • Left Side Conduit Connection

Options

  • External Set Point Adjustment

Diaphragm Material

  • 630 Stainless Steel

Stability

  • ± 0.5% of Full Scale Output/Year

Hysteresis

  • ± 0.2% of Span

Burst Pressure

  • bar: 33.09 to 4,136
  • kPa: 3,309 to 413,685
  • psig: 480 to 60,000

SAE Connection

  • 7/16”-20 SAE Male - 1/4” SAE Female

O-Ring Material

  • 630 Stainless Steel

Adjustment Type

  • Factory Set (Pre-Set)
  • Field Adjustable

Operating Temperature

  • -28° to 82° C (-20° to 180° F)

System Pressure

  • bar: 4.14 to 1,654
  • kPa: 413.7 to 165,474
  • psig: 60 to 24,000

Temperature Range

  • -28° to 82° C (-20° to 180° F)

Accuracy

  • ± 0.4 % BFSL
  • ± 1.0 % of Full Scale Output

Output

  • 4-20 mA

Set Point - Decreasing

  • bar: 4.137 to 1,379
  • kPa: 413.7 to 137,900
  • psig: 60 to 20,000

Switch Type

  • SPDT

Electrical Rating

  • 10 A, 250 Vac, 10 A, 3 Vdc
  • 10 A, 250 Vac, 10 A, 30 Vdc, 4-20 mA

Process Connection Material

  • 316 Stainless Steel

Response Time

  • ≤ 5 milliseconds

Supply Voltage

  • 36 Vdc (Unregulated)

Repeatability

  • ± 0.5%
  • 0.07%

  • High-Cycle Applications
  • Hydraulic Systems
  • Infusion Pumps
  • Injection Molding
  • Machine Tools
  • Pipelines
  • Presses
  • Process Applications
  • Turbines & Compressors

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