Description
Bently 330500-02-04
Technical Specifications
- Product Series: 330500 Velocity Sensor
- Measurement Type: Absolute Casing Vibration (Velocity)
- Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ± 5%
- Mounting Thread: M8 x 1 Metric
- System Compliance: API 670 Standard
Functional Features
- Mid-Frequency Optimization: Superior signal-to-noise ratio in the 10 Hz to 1 kHz range, perfectly matching the dominant vibration frequencies of rotating machinery.
- Omni-Directional Mounting: Utilizes solid-state electronics, allowing vertical, horizontal, or any-angle installation without sensitivity degradation.
- Direct Velocity Output: Eliminates the need for external integration circuitry required by accelerometers.
Application Scenarios
Widely utilized in power generation, petrochemical, and metallurgical industries for online measurement and protection of steam turbines, water turbines, blowers, compressors, gearboxes, and large pumps.
Performance Parameters
- Frequency Response: 4.5 Hz to 5 kHz (± 3.0 dB); 6.0 Hz to 2.5 kHz (± 0.9 dB)
- Maximum Cable Length: 305 meters (1000 feet)
- Operating Temperature Range: -55°C to +121°C
- Supply Voltage: +8 to +30 VDC (ICP/IEPE powered)
Material Composition
The sensor housing is constructed from 316L stainless steel, providing exceptional resistance to corrosion, chemicals, and mechanical abrasion in aggressive industrial atmospheres.
Structural Characteristics
Features a compact cylindrical profile with a precision M8 threaded base. The internal solid-state design ensures robustness against continuous high-frequency mechanical shock and vibration.
Working Principle
Combines piezoelectric sensing with internal microelectronic integration. The raw acceleration signal is electronically integrated to produce a velocity-proportional output, offering high sensitivity for mid-frequency machinery vibrations.
Installation Requirements
Securely mount to a clean, flat, and unpainted machined surface using the M8 thread. Apply the specified torque to ensure rigid mechanical coupling and accurate signal transmission.
Usage Precautions
Use the specified dual-core shielded cable (e.g., 84661 or 9571) for signal transmission. Avoid routing the cable parallel to high-voltage power lines to prevent electromagnetic interference.
