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Product Introduction
The Bently Nevada 330505-02 Low Frequency Velocity Sensor is specifically designed for monitoring low-frequency vibrations in machinery, such as hydroelectric turbines, where slow rotating speeds require detecting low signal-to-noise ratios. It detects vibrations of the stator core, stator frame, and bearing housing supports, providing early warning of potential machinery problems and aiding in diagnostics before issues become serious.
Product Specifications
| Parameter | Details |
| Model Number | 330505-02 |
| Sensor Type | Low Frequency Velocity Sensor |
| Frequency Range | 0.5 Hz to 100 Hz |
| Sensitivity | 3.94 mV/mm/s (100 mV/in/s) ±5% |
| Transducer Mounting Angle | 90° ± 5° |
| Internal Mounting Thread | 3/8-24 UNF-2B |
| Mounting Adapter Option | M8 x 1 |
| Housing Material | Stainless Steel |
| Operating Temperature | -55°C to +121°C (-67°F to +250°F) |
| Dimensions | 9.5 x 3.2 x 3.2 cm |
| Weight | 0.34 kg |
| Output Signal | Voltage (proportional to velocity) |
| Power Supply | Self-powered (two-wire system) |
| Connector Type | 2-pin MIL-C-5015, hermetically sealed |
| Approvals | ROHS |
Product Applications
The 330505-02 sensor is ideal for monitoring:
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Hydroelectric turbines
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Stator core and frame vibrations
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Bearing housing supports
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Low-speed rotating machinery
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Municipal engineering applications
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Oil and gas industry equipment
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Petrochemical industry machinery
Product Advantages
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Low-Frequency Detection: Accurately measures vibrations in low-speed machinery.
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Robust Construction: Stainless steel housing ensures durability in harsh environments.
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High Sensitivity: Provides precise velocity measurements for early fault detection.
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Versatile Mounting Options: Multiple mounting configurations for ease of installation.
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Wide Operating Temperature Range: Suitable for various industrial conditions.
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Self-Powered Design: Simplifies wiring and reduces installation costs.
Recent News Headlines
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“Bently Nevada Introduces Enhanced Low-Frequency Velocity Sensors for Hydroelectric Applications”
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“Advancements in Vibration Monitoring: Bently Nevada’s 330505-02 Sensor Gains Industry Recognition”
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“Bently Nevada Expands Sensor Line to Address Low-Speed Machinery Monitoring Needs”
Frequently Asked Questions (FAQ)
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What is the primary function of the 330505-02 sensor?
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It measures low-frequency vibrations in machinery, aiding in early detection of potential issues.
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Can this sensor be used in high-temperature environments?
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Yes, it operates effectively in temperatures ranging from -55°C to +121°C.
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Is the sensor suitable for outdoor installations?
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Yes, its robust stainless steel housing and sealed connector make it suitable for harsh environments.
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What type of output does the sensor provide?
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It provides a voltage output proportional to the measured vibration velocity.
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Does the sensor require external power?
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No, it is self-powered using a two-wire system.
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What are the mounting options for this sensor?
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It features a 3/8-24 UNF-2B internal thread and an M8 x 1 mounting adapter option.
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Is the sensor compatible with standard monitoring systems?
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Yes, it integrates seamlessly with most vibration monitoring equipment.
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What certifications does the sensor have?
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It holds ROHS approval.
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Can the sensor be used for both vertical and horizontal installations?
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Yes, it can be mounted in any orientation without affecting performance.
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What is the expected lifespan of the sensor?
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With no moving parts, it offers a long operational life with minimal maintenance.
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Related or Same-Series Models (Same Series or Function)
| Model Number | Description | Sensor Type | Key Feature |
| 330505-01-02-02 | Low Frequency Velocity Sensor | Velocity Sensor | 0° mounting angle configuration |
| 330505-02-02-02 | Low Frequency Velocity Sensor | Velocity Sensor | 90° mounting angle, enhanced sealing |
| 330505-03-01-01 | Low Frequency Velocity Sensor | Velocity Sensor | Custom mounting and connector options |
| 330500-00-00 | Velomitor Piezo-Velocity Sensor | Piezo-Velocity Sensor | General-purpose use with standard sensitivity |
| 330500-01-00 | Velomitor Piezo-Velocity Sensor (Side Exit) | Piezo-Velocity Sensor | Compact design for tight spaces |
| 330500-02-00 | Modified Response Velomitor | Piezo-Velocity Sensor | Adjusted frequency range |
| 330525-01-01 | High Temperature Velomitor Sensor | Piezo-Velocity Sensor | Suitable for elevated temperature environments |
| 330400-01-00 | Dual Output Velocity/Acceleration Sensor | Combined Sensor | Provides both velocity and acceleration outputs |
Popular Models from the Same Brand (Bently Nevada)
| Model Number | Description | Function | Typical Application |
| 3300 XL 8mm | Proximity Probe System | Shaft Vibration Monitoring | Rotating equipment (e.g., turbines, compressors) |
| 3500/22M | Transient Data Interface (TDI) Module | System Interface Module | 3500 Machinery Protection Systems |
| 3500/42M | Proximitor/Seismic Monitor | Vibration Monitoring | Dynamic signal measurement |
| 3500/60 | Temperature Monitor | Temperature Sensing | Process and machine protection |
| 7200 Series | Legacy Vibration Monitoring System | Vibration & Position Sensing | Older machinery monitoring setups |
| ADAPT 3701/44 | Smart Vibration Monitor | Wireless Monitoring | Remote asset diagnostics |
| 3500/94 | VGA Display Module | System Visualization | 3500 system interface with VGA screen |
| 1900/65A | General Machinery Monitor | Compact Monitoring | Compressors, pumps, blowers |
