Emerson EPRO PR9268/617-100 Electrodynamic Vibration Velocity Sensor

Electrodynamic Velocity Sensor

Mechanical velocity sensor for absolute vibration measurement of critical turbomachinery applications such as steam, gas and hydro turbines, compressors, pumps, and fans to measure case vibration.

Sensor Orientation:

• PR9268/01x-x00: Omni Directional
• PR9268/20x-x00: Vertical, ± 60°
• PR9268/30x-x00: Horizontal, ± 30°
• PR9268/60x-000: Vertical, ± 30° (without lifting current) / Vertical, ± 60° (with lifting current)
• PR9268/70x-000: Horizontal, ± 10° (without lifting current) / Horizontal, ± 30° (with lifting current)

Dynamic Performance (PR9268/01x-x00):

• Sensitivity: 17.5 mV/mm/s
• Frequency Range: 14 to 1000Hz
• Natural Frequency: 4.5Hz ± 0.75Hz @ 20°C (68°F)
• Transverse Sensitivity: < 0.1g @ 80Hz
• Vibration Amplitude: ± 500µm
• Amplitude Linearity: < 2%
• Maximum Acceleration: 10g (98.1 m/s²) continuous, 20g (196.2 m/s²) intermittent
• Maximum Transverse Acceleration: 2g (19.62 m/s²)
• Damping Factor: ~0.6% @ 20°C (68°F)
• Resistance: 1723Ω ± 2%
• Inductance: ≤ 90 mH
• Active Capacity: < 1.2 nF

Dynamic Performance (PR9268/60x-000 & PR9268/70x-000):

• Sensitivity:
  • 22.0 mV/mm/s ± 5% @ Pin 3, 100Ω load
  • 16.7 mV/mm/s ± 5% @ Pin 1, 50Ω load
  • 16.7 mV/mm/s ± 5% @ Pin 4, 20Ω load
• Frequency Range: 10 to 1000Hz
• Natural Frequency: 8Hz ± 1.5Hz @ 20°C (68°F)
• Transverse Sensitivity: 0.10 mV/mm/s @ 80Hz
• Vibration Amplitude (mechanical limit): ± 1500µm (± 2000µm)
• Amplitude Linearity: < 2%
• Maximum Acceleration: 10g (98.1 m/s²) continuous, 20g (196.2 m/s²) intermittent
• Maximum Transverse Acceleration: 2g (19.62 m/s²)
• Damping Factor:
  • ~0.7 @ 20°C (68°F)
  • ~0.5 @ 200°C (392°F)
• Resistance:
  • 3270Ω ± 10% @ Pin 3
  • 3770Ω ± 10% @ Pin 1
• Inductance: ≤ 160 mH
• Active Capacity: Insignificant