EPRO PR9268/206-100

The EPRO PR9268/206-100 is an electrodynamic velocity sensor designed for absolute vibration measurement. It is typically used in critical turbomachinery applications such as steam, gas, and hydro turbines, compressors, pumps, and fans to measure case vibration. This sensor is part of the PR9268 series from EPRO (now Emerson). The “/206” designation indicates a vertical sensor orientation.  

Key Characteristics:

• Electrodynamic Velocity Sensor: Measures absolute vibration velocity.
• Vertical Orientation: Designed for vertical vibration measurement (± 30°).
• Self-Powered: Does not require an external power supply.
• Rugged Construction: Suitable for harsh industrial environments.

Product Parameters:

• 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 peak-peak
• Amplitude Linearity: < 2%
• Maximum Acceleration: 10g (98.1 m/s²) peak-peak continuous, 20g (196.2 m/s²) peak-peak intermittent
• Maximum Transverse Acceleration: 2g (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
• 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
• Weight: 930 g (without cable)  

Specifications:

• Manufacturer: EPRO (Emerson)
• Product Type: Electrodynamic Velocity Sensor
• Series: PR9268
• Model Number: PR9268/206-100