Emerson PR9268/202-000 Electrodynamic Velocity Sensor

The PR9268/202-000 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. Its primary function is to measure case vibration, ensuring reliable operation of industrial equipment.

Key Features

Sensor Orientation

Model: PR9268/20x-x00
Orientation: Vertical, ± 30° (without sinking current)

Dynamic Performance

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 @ 110 Hz
Vibration Amplitude (Mechanical Limit): 3000 µm (4000 µm) peak-to-peak
Amplitude Linearity: < 2%
Maximum Acceleration:
- Continuous: 10g (98.1 m/s²) peak-to-peak
- Intermittent: 20g (196.2 m/s²) peak-to-peak
Maximum Transverse Acceleration: 2g (19.62 m/s²)
Damping Factor:
- ~0.56 @ 20°C (68°F)
- ~0.42 @ 100°C (212°F)
Resistance: 1875Ω ± 10%
Inductance: ≤ 90 mH
Active Capacity: < 1.2 nF

Environmental Specifications

Operating Temperature Range:
- Self-Powered: -20°C to +100°C (-4°F to 212°F)
Protection Class: IP55
Relative Humidity: 0 to 100%, non-condensing
Material: Al Mg Si Pb F 28
Weight: 930 g