Bently Nevada 330752-25 High-Temperature Velomitor System

The Bently Nevada 330752-25 is designed to monitor vibration in high-temperature industrial environments. It provides accurate and reliable measurement for machinery such as gas turbines and steam turbines, operating at temperatures up to 400°C (752°F). Its remote electronics and robust sensing element ensure optimal performance even under extreme conditions. This system measures vibration velocity, helping to detect machine health issues like imbalance, misalignment, and bearing wear.

Technical Specifications

• Product Type: High Temperature Velomitor System
• Sensing Head Temperature Range: -55°C to +400°C (-67°F to +752°F)
• Electronics Temperature Range: -55°C to +121°C (-67°F to +250°F)
• Electrical Sensitivity: 5.7 mV/mm/s (145 mV/in/s) ±5%
• Frequency Response:
  • 15 to 2000 Hz (900 to 120,000 cpm) – 3.0 dB
  • 20 to 1000 Hz (1,200 to 60,000 cpm) – 0.9 dB
• Amplitude Range:
  • 635 mm/s (25 in/s) peak below 680 Hz
  • 2940 m/s² (300 g) peak above 680 Hz
• Transverse Sensitivity: Less than 5% of sensitivity
• Amplitude Linearity: ±2% to 152 mm/s (6 in/s) peak
• Mounted Resonant Frequency: Greater than 5 kHz
• Output Bias Voltage: -12 ±2.0 VDC
• Broadband Noise Floor (15Hz to 2kHz): 0.127 mm/s (0.005 in/s) rms nominal
• Maximum Cable Length: 305 meters (1000 feet) with no signal degradation