EMERSON PR9268/201-000 Electrodynamic Velocity Sensor

General Description

The PR9268/201-000 is a mechanical velocity sensor designed for absolute vibration measurement in critical turbomachinery applications such as steam, gas, and hydro turbines, compressors, pumps, and fans. This sensor effectively measures case vibration, ensuring optimal performance and safety.

Sensor Specifications

• Sensor Orientation:
  • PR9268/20x-x00
  • Vertical, ± 30° (without sinking current)
• Sensitivity:
  • 28.5 mV/mm/s (723.9 mV/in/s)
• Frequency Range:
  • 4 to 1000 Hz
• Natural Frequency:
  • 4.5 Hz ± 0.75 Hz @ 20°C (68°F)
• Transverse Sensitivity:
  • 0.13 (PR9268/20x-x00) @ 110 Hz
• Vibration Amplitude (Mechanical Limit):
  • 3000 µm (4000 µm) peak-to-peak
• Amplitude Linearity:
  • < 2%
• Maximum Acceleration:
  • 10 g (98.1 m/s²) peak-to-peak continuous
  • 20 g (196.2 m/s²) peak-to-peak intermittent
• Maximum Transverse Acceleration:
  • 2 g (19.62 m/s²)
• Damping Factor:
  • ~0.56 @ 20°C (68°F)
  • ~0.42 @ 100°C (212°F)
• Resistance:
  • 1875 Ω ± 10%
• Inductance:
  • ≤ 90 mH
• Active Capacity:
  • < 1.2 nF

Environmental Specifications

• Operating Temperature Range:
  • -20 to +100°C (-4 to 212°F)
• Protection Class:
  • IP55
• Relative Humidity:
  • 0 to 100%, Non-Condensing
• Material:
  • Al Mg Si Pb F 28
• Cable:
  • PTFE, 3x 0.5 mm²
• Armor:
  • Stainless Steel
• Connector:
  • Harting Plug Die Cast Aluminium
• Weight:
  • 930 g

Hazardous Area Approvals

• ATEX:
  • II 1G Ex ia IIC T6 Ga
  • II 1G Ex ia IIC T4 Ga
  • Tamb:
    • T6 (-20°C ≤ Tamb ≤ 68°C)
    • T4 (-20°C ≤ Tamb ≤ 108°C)
• IEC-Ex:
  • Ex ia IIC T6 Ga
  • Ex ia IIC T4 Ga

Ordering Information (PR9268/XX-X-X00)

• Model No.: PR9268
• Measurement Type XX: 20 (Vertical)
• Cable X: 1 (5m, Armored)
• Cable End X: 0 (Harting Plug)

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