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

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