Ashcroft Pressure Sensor

APPLICATIONS:
KM 41 is ideally suited to address the demanding pressure sensing needs of the original equipment manufacturer in a multitude of applications, including:
• Off-Road Equipment
• Construction Machinery
• HVAC/Refrigeration
• Compressor Control
• Pump Monitoring
• Agricultural Implements
• Diagnostic Kits
• Engine Monitoring
• Process Automation & Control
• Hydraulic & Pneumatic Sensing
FEATURES:
• 1% Total Error Band Accuracy
• Broad Temperature Capability
• All-welded pressure construction
• High EMI/RFI rating
• Ranges .06 mPa through 200 mPa
• IP 65 Ingress rating
The Ashcroft KM41 pressure transducer combines proven polysilicon thin film sensor technology with a high performance ASIC to provide a highly accurate and stable transducer. The 17-4PH stainless steel sensor is electron beam welded to a stainless steel pressure fitting which provides excellent overpressure capability and outstanding durability in high shock and vibration applications. Calibration via digital compensation results in an extremely accurate instrument over a wide temperature range. The KM41 design is well suited for demanding, high cycle, hydraulic and pneumatic applications found onboard mobile hydraulic equipment.
PERFORMANCE SPECIFICATIONS：
Ref. Condition 21°C ±1°C (72°F ±2°F)
Accuracy:
Total Error Band includes combined effects of temperature, non-linearity (Terminal Point Method), hysteresis,
non repeatabilty, zero offset and span setting errors
±1% of Span: From –20 to 85ºC (–4 to 185ºF)
±3.0% of Span: From –40 to -20ºC (–40 to –4ºF)
±2.5% of Span: From 85 to 125ºC (185 to 257ºF)
Note: Static accuracy ±0.5% of span BFSL (Best Fit
Straight Line Method); includes non-linearity,
hysteresis and non-repeatable effects at reference
temperature 72°F (21°C)
Stability: Less than ±0.25% span/year
Durability: Tested to 50 million cycles
ENVIRONMENTAL SPECIFICATIONS：
Temperature:
Compensated –40 to 125°C (–40 to 257°F)
Operating –40 to 125°C (–40 to 257°F)
Storage –40 to 125°C (–40 to 257°F)
Humidity: 0 to 100% R.H., no effect
FUNCTIONAL SPECIFICATIONS
Select from over 25 pressure ranges starting at 30
psi and running through 20,000 psi gauge.
Compound (vacuum & pressure) ranges are also
available, see “To Order” on back.
Overpressure (F.S.): Proof Burst
35 MPa 200% 500%
70 MPa 150% 240%
200 MPa 120% 240%
Vibration: Testing according to IEC 68-2-6
and IEC 68-2-36
Shock: Testing according to IEC 68-2-32
Drop Test: Withstands 1 meter on steel plate
Response Time: Less than 1 msec
Warm-up Time: Less than 500 msec typical
Position Effect: Less than ±0.01% span, typical
ELECTRICAL SPECIFICATIONS
Output Signals Available:
Supply
Voltage Output Excitation Current
0-10 Vdc, 3 wire 12-32 Vdc 5mA
Ratiometric Output:
0.5-4.5 Vdc, 3 wire 5 Vdc ±0.5 Vdc 4mA
Current Output:
4-20mA, 2 wire 12-32 Vdc
Reverse Polarity & Miswired Protected: Yes
Insulation Breakdown Voltage: 100 Vac
Insulation Resistance: Greater than 100 megohms
at 100 Vdc
CE Compliance: Testing to DIN EN 55011
and DIN 61000-4-3
PHYSICAL SPECIFICATIONS
Pressure Connection: 304 stainless steel
Sensor Material: 17-4PH SS
Housing: Stainless steel
Available Process Connections (Male):
G1
⁄4A, Form E, 1
⁄4 BSP, 1
⁄4 NPT
For other connections consult factory
Ingress Rating: IP65
Weight: 90g
ELECTRICAL TERMINATION
• Shielded Cable: 3´ standard, 24 AWG, PVC Jacket
• Metri-Pack 150 series*
• MVS DIN EN 175 301 803
*Metri-Pack is a trademark of Delphi Packard Electric Systems