Model K1 Pressure Transmitter

Part Number: MODEL K1 Brand: Ashcroft Inc.
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The Ashcroft K1 is a proven and versatile pressure transducer/transmitter incorporating polysilicon thin film technology. Modern low-pressure chemical vapor deposition methods provide simple, stable molecular bonds between the metal diaphragm and a polysilicon strain gage bridge. 

There are no epoxies or bonding agents to contribute to signal instability or drift. The integral metal diaphragm and polysilicon bridge are virtually unaffected by shock, vibration or mounting. These transmitters are offered in many standard pressure ranges with either current or voltage output signals. 

Transmitter performance is directly traceable to the NationaI Institute of Standards and Technology. 

A calibration test certificate is available with each transmitter.
Features
  • 0.5% and 1% accuracy 
  • Vacuum 20,000 psi pressure range 
  • FM approved (optional) 
  • Superior long-term stability and repeatability 
  • Stainless steel NEMA 4X enclosure 
  • Current/voltage output 
  • Wide range of electrical connections available 
  • Optional panel meter digital display 

Specifications

Accuracy

  • ± 0.5% of Span
  • ± 1% of Span

Applications

  • Construction Equipment
  • General-purpose
  • HVAC Equipment
  • Hydraulic Applications
  • Industrial Applications
  • Machine Tools
  • Medical Equipment
  • Pump Control
  • Refrigerators
  • Test & Measurement

Approvals & Certifications

  • FM
  • UL

Burst Pressure

  • 150% to 800% of Full Scale

Compensated Temperature

  • -28° to 71° C (-20° to 160° F)

Diaphragm Material

  • 630 Stainless Steel

Display

  • Digital Display

Electrical Connectors

  • 1/2" NPT Male Conduit with 36" Cable Leads
  • 4-Pin Bendix
  • 6-Pin Bendix
  • Hirschmann Miniature
  • No. 24 AWG, 36" PVC, Shielded

Electrical Protection

  • Reverse Polarity

Enclosure, Body Material

  • 300 Series Stainless Steel
  • Stainless Steel

Environmental Protection

  • IP10
  • IP66
  • NEMA 1
  • NEMA 4X

Humidity

  • 95% Relative Humidity, Non-Condensing

Non-Linearity

  • ± 0.25% of BFSL
  • ± 0.4% of BFSL

NPT Connection

  • 1/4" NPT Female
  • 1/4" NPT Male
  • 1/8" NPT Female
  • 1/8" NPT Male

Operating Temperature

  • -28° to 82° C (-20° to 180° F)

Output

  • 1-11 Vdc, 3-Wire
  • 1-5 Vdc, 3-Wire
  • 1-6 Vdc, 3-Wire
  • 4-20 mA, 2-Wire

Position Effect

  • < 0.01% of Full Scale

Power Requirement

  • 10-36 Vdc Unregulated, < 3 mA for Voltage Output

Pressure Cycles

  • Durability: 10⁸ Cycles 20 / 80% of Span with Negligible Performance Change

Pressure Range

  • bar: 0 to 1,379
  • kPa: 0 to 137,900
  • psi: 0 to 20,000

Pressure Type

  • Compound Pressure
  • Gauge

Proof Pressure

  • 120% to 200% of Full Scale

Response Time

  • < 5 milliseconds

SAE Connection

  • 7/16"-20 SAE Male

Shock

  • 100 G, 20 milliseconds Shock in Any Axis

Span & Zero Effect

  • 0.5% Accuracy Class Only: ± 0.014% of Span / °F
  • Accuracy Class 0.5%: ± 0.028% of Span / °F
  • Accuracy Class 1%: ± 0.04% of Span / °F

Stability

  • ± 0.5% of Span/Year

Storage Temperature

  • -54° to 121° C (-65° to 250° F)

UNF/UNC Connection

  • 9/16"-18 UNF Female 2B AMINCO

Vibration Effect

  • Vibration Sweep: <± 0.1% of Full Scale for 0 to 2,000 Hz at 20 G's in Any Axis
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