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N-Series Electronic Pressure Switch

Brand: Ashcroft Inc

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The Ashcroft® NPA watertight 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.
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 
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The Ashcroft® NPA watertight 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.
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 
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1 model matching criteria
N-SERIES ELECTRONIC PRESSURE SWITCH
  • Function - Single Set Point, Adjustable Deadband
  • Enclosure - Watertight NEMA 3, 4, 4X, 13 & IP66
  • Output - SPDT Relay Output: 10 A, 250 Vac, 10 A, 30 Vdc
  • Power Requirements - 110 Vac, 50/60 Hz
  • Pressure Port - 1/8" Male NPT
  • Adjustment Type - No Adjustment
  • Pressure Range - psi: 60
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Specifications

Brand

Proof Pressure

  • psi: 120 to 24,000 (kPa: 827.4 to 165,500, bar: 8.27 to 1,655)

Response Time

  • < 5 milliseconds

Non-Repeatability

  • ± 0.07 % of Full Scale

Compensated Temperature

  • -29° to 71° C (-20° to 160° F)

Zero Offset

  • ± 1 % of Full Scale

Power Requirement

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

Hysteresis

  • ± 0.2 % of Full Scale

Storage Temperature

  • -54° to 120° C (-65° to 250° F)

Environmental Protection

  • Explosion-proof
  • IP54
  • IP66
  • NEMA 13
  • NEMA 3
  • NEMA 4
  • NEMA 4X
  • NEMA 7
  • NEMA 9
  • Watertight

Process Connection Material

  • 316 Stainless Steel

Diaphragm Material

  • 630 Stainless Steel (17-4 PH)

Set Point - Decreasing

  • bar: 0.2 to 1,379
  • kPa: 20.68 to 137,900
  • psi: 3 to 20,000

Set Point - Increasing

  • bar: 0.2 to 1,379
  • kPa: 20.68 to 137,900
  • psi: 3 to 20,000

Indication

  • LED

SAE Connection

  • 1/4” SAE
  • 7/16”-20 SAE

Supply Voltage

  • 36 Vdc (Unregulated)

Switch Type

  • SPDT

Electrical Protection

  • Reverse Polarity

Pressure Range

  • psi: 3 to 20,000 (kPa: 20.68 to 137,900, bar: 0.2 to 137.9)

Output

  • 10 A at 250 Vac
  • 10 A at 30 Vdc
  • 4-20 mA, 2-Wire

System Pressure

  • bar: 0 to 1,655
  • kPa: 0 to 165,500
  • psi: 0 to 24,000

Non-Linearity

  • BFSL: ± 0.4 % of Full Scale
  • Terminal Point: ± 0.7 % of Full Scale

Burst Pressure

  • psi: 480 to 60,000 (kPa: 3,309 to 413,700, bar: 33 to 4,137)

Electrical Rating

  • 10 A at 250 Vac
  • 10 A at 30 Vdc

Cone & Thread Connection

  • 1/4” AMINCO Female

Stability

  • ± 0.5 % of Full Scale Per Year Non-Cumulative

Electrical Connectors

  • Terminal Block

NPT Connection

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

Accuracy

  • 1 % of Full Scale

Approvals & Certifications

  • ISO 9001

Temperature Coefficient

  • Zero & Span: ± 0.040 % of Full Scale/°F (1 % Accuracy)

Operating Temperature

  • -29° to 82.2° C (-20° to 180° F)
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Typical Applications

  • High Cycles
  • Hydraulic Systems
  • Injection Molding Machines
  • Machine Tools
  • OEM Equipment
  • Pipelines
  • Presses
  • Pumps
  • Turbines & Compressors
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