BENTLY 330750-40 Velocity Sensor

Product Description

BENTLY NEVADA 330750-40 is a High Temperature Velomitor® Piezoelectric Velocity Sensor System designed for measuring machine casing vibration velocity in high-temperature environments. It is part of the Bently Nevada 330750/330752 series and is used for condition monitoring of critical rotating machinery.

The sensor uses a piezoelectric integrating accelerometer design with the sensing element separated from the signal conditioning electronics, allowing the sensing head to be installed on surfaces with temperatures up to +400°C (752°F).

Specifications

• Brand: BENTLY NEVADA
• Model: 330750-40
• Product Type: High Temperature Velocity Sensor / Velomitor Sensor
• Series: 330750 High Temperature Velomitor System
• Measurement Type: Absolute casing vibration velocity
• Sensor Technology: Piezoelectric velocity transducer
• Sensitivity:
  • 5.7 mV/mm/s
  • 145 mV/in/s ±5%
• Frequency Response:
  • 15 Hz to 2000 Hz (±3 dB)
  • 20 Hz to 1000 Hz (±0.9 dB)
• Cable Length: 4 meters
• Maximum Cable Length: Up to 305 m without signal degradation
• Temperature Range:
  • Sensor head: -55°C to +400°C
  • Electronics: -55°C to +121°C
• Output: Velocity proportional voltage signal
• Connector: 2-pin MIL-C-5015 hermetically sealed connector
• Housing Material: 300-series stainless steel
• Mounting: Machine casing mounting

Advantages & Features

• Designed for high-temperature vibration monitoring
• Sensor head and electronics separated to protect signal conditioning components
• Measures low-frequency machine vibration accurately
• Rugged stainless-steel construction
• Suitable for harsh industrial environments
• Long cable transmission capability
• Reliable condition monitoring solution for critical rotating equipment

Applications

• Steam turbines
• Gas turbines
• Compressors
• Pumps
• Motors
• Generators
• High-temperature rotating machinery
• Machinery condition monitoring systems

Notes

• 330750-40 is a velocity sensor, not a proximity probe
• It measures casing vibration velocity, while Bently Nevada proximity probes measure shaft displacement
• Requires compatible vibration monitoring equipment such as Bently Nevada monitoring systems
• Verify cable length and mounting requirements before replacement
• Confirm operating temperature conditions before installation