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The Ashcroft K8 is a proven pressure transducer incorporating polysilicon thin film technology. Modern low-pressure chemical vapor deposition methods provide simple, stable molecular bonds between metal diaphragm and a polysilicon strain gage bridge.
There are no epoxies or bonding agents to contribute to signal instability or drift. The K8 is offered in many standard pressure ranges with high quality millivolt output. Signal output is proportional to supply voltage, and sensitivity varies between 6 to 18 mV/V at full scale.
Transducer performance is directly traceable to the National Institute of Standards and Technology.
Features- 0.5% and 1% accuracy
- psi: 45 to 20,000 (kPa: 310.3 to 137,900, bar: 3.1 to 1,379) pressure ranges
- Superior long-term stability and repeatability
- Wide range of pressure and electrical connections available
- Miniature size and light weight
- Millivolt output
Specifications
Brand
Accuracy
- ± 0.5% of Span
- ± 1% of Span
Applications
- Compressors
- Construction Equipment
- Control Valves
- General-purpose Industrial Process Applications
- Hand Tools
- HVAC Equipment
- Hydraulic Applications
- Machine Tools
- Medical
- OEM Applications
Approvals & Certifications
- CRN
- UL
Burst Pressure
- 150% of Full Scale of psi: 7,500 to 20,000 (kPa: 51,711 to 137,895, bar: 517.1 to 1,379)
- 300% of Full Scale of psi: 3,000 to 5,000 (kPa: 20,684 to 34,474, bar: 206.8 to 344.7)
- 800% of Full Scale of psi: 45 to 2,000 (kPa: 310.3 to 13,970, bar: 3.1 to 137.9)
Compensated Temperature
- -28° to 82° C (-20° to 180° F)
Cone & Thread Connection
- 1/4" AMINCO Female
Current
- Supply Current: 1.4 mA (Nominal)
Diaphragm Material
- 630 Stainless Steel (17-4 PH)
Excitation Voltage
- 3-10 Vdc Regulated
Humidity
- 95% Relative Humidity, Non-Condensing
Insulation Resistance
- 100 MegaOhms at 50 Vdc
Materials of Construction
- Socket: 300 Series Stainless Steel
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
- Output ( Sensitivity): Varies from 6-18 mV/V at Full Scale Depending Upon Pressure Range
Position Effect
- < 0.01% of Full Scale
Pressure Range
- bar: 0 to 1,379
- kPa: 0 to 137,900
- psi: 0 to 20,000
Proof Pressure
- 120% of Full Scale of psi: 7,500 to 20,000 (kPa: 51,711 to 137,895, bar: 517.1 to 1,379)
- 150% of Full Scale of psi: 3,000 to 5,000 (kPa: 20,684 to 34,474, bar: 206.8 to 344.7)
- 200% of Full Scale of psi: 45 to 2,000 (kPa: 310.3 to 13,970, bar: 3.1 to 137.9)
Resistance
- Bridge Resistance: 3,500 ohms (Nominal)
Response Time
- < 5 milliseconds
SAE Connection
- 7/16"-20 SAE Male
Shock
- <± 0.05% of Full Scale Effect for 100 G, 20 milliseconds in Any Axis
Span & Zero Effect
- Accuracy Class 0.5%: ± 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)
Termination
- 36" Cable, Shielded, PVC Sheathing
- 4" Polyethylene Coated, 30 AWG
Tube Connection
- 1/4" Compression Fitting
UNF/UNC Connection
- 7/16-18 UNF
Vibration Effect
- Vibration Sweep: <± 0.1% of Full Scale for 0 to 2,000 Hz at 20 G's in Any Axis
Zero Offset
- ± 3 mV/Vdc
