Pressure Transducers for Industrial Applications

The PXM309 series industrial pressure transducers from OMEGA incorporate two of their precision manufacturing methods. Low pressure ranges from 0 - 70 mbar up to 0 - 3.5 bar, and absolute ranges up to 20 bar use a precision micromachined silicon sensor that is protected by a stainless steel diaphragm.

A thin film of oil transfers the pressure and guarantees the high stability and accuracy of the sensor. High and medium gauge pressure ranges from 0 - 7 bar up to 0 - 700 bar, and use precision semiconductor strain gauges that are combined directly to the stainless steel diaphragm. This yields a robust, durable bond that guarantees high stability and long life.

The PXM309 series transducers are supplied in gauge (relative), or absolute pressure and are sealed to an IP65 or IP67 environmental rating, based on the model.

• Five-point traceable calibration certificate
• RoHS compliant
• High static accuracy, ±0.25% FS BSL (linearity, hysteresis and repeatability)
• Micro DIN, 1.5 m cable or M12 electrical connections
• -40 to +85 °C Operating Temperature
• 0 to 10 Vdc Output
• G¼ (¼" BSPP) male pressure fitting
• Rugged design for industrial applications
• All stainless steel wetted parts with IP65 or IP67 environmental rating (depending upon model)
• Vacuum ranges are also available

Specifications

The key specifications of the PXM309 series transducers are as follows:

• Static accuracy 350 mB to 700 bar: ±0.25% FS BSL at 25 °C (includes hysteresis, linearity, and repeatability)
• Supply voltage: Reverse polarity and over voltage protected 15 to 30 Vdc at 10 mA
• Total error band¹
  • 70 mB: ±4.5% gauge
  • 140 mB: ±3% gauge
  • 350 mB: ±1.5% gauge and absolute
  • 1 to 20 bar: ±1% absolute
  • 1 to 700 bar: ±1% gauge
• Long term stability (1 yr): ±0.25% FS
• Pressure overload
  • 70 mB to 3.5 bar gauge: 3 x rated pressure or 1.38 bar whichever is greater
  • 350 mB to 20 bar absolute: 3 x rated pressure or 1.38 bar whichever is greater
  • 7 to 700 bar gauge: 2 x rated pressure
• Pressure cycles: 1 x 10⁷ full scale cycles
• Burst pressure
  • 70 mB to 3.5 bar gauge: 5 x rated pressure or 1.72 bar whichever is greater
  • 350 mB to 20 bar absolute: 5 x rated pressure or 1.72 bar whichever is greater
  • 7 to 700 bar gauge: 5 x rated pressure
• Compensated temperature
  • 70 to 350 mbar gauge/Abs: 0 to 50 °C
  • 1 to 700 bar gauge: -20 to 85 °C
  • 1 to 20 bar absolute: -20 to 85 °C
• Isolation (body to any lead): 1 MO at 25 Vdc
• ROHS compliant: Yes
• Response time: 1 mS
• Shock: 50 g 11 mSec half sine shock
• Bandwidth: DC to 1 kHz typ.
• IEC: 61000-2,-3,-4,-5,-6, and -9
• Pressure connection: G ¼ Male (¼" BSPP)
• Wetted parts
  • 70 mB to 3.5 bar gauge: 316 SS
  • 350 mB to 20 bar absolute: 316 SS
  • 7 to 700 bar gauge: 17-4PH SS
• Operating temperature: -40 to 85 °C
• CE compliant: EC55022, EC55011 emissions class A and B
• Vibration: ± 20 g
• Weight: Typical 150 g based on configuration
• Electrical Connections
  • PXM309: 1.5 m long 3-core cable
  • PXM319: includes mini DIN connector with mating connector
  • PXM359: M12 4-pin connector

Note 1: Total error band includes all thermal errors, accuracy errors, span and zero tolerances.

Dimensions and IP Ratings

The PXM309 is also offered in imperial configurations, with ranges from 0 - 1 psi to 0 - 10,000 psi and 1/4"-18 NPT) imperial fitting.