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Product Overview
The Bently Nevada 330500-03-05 Velomitor Piezo-velocity Sensor is a solid-state sensor engineered to monitor absolute casing or bearing housing vibrations in rotating machinery. It integrates piezoelectric acceleration sensing and velocity conversion electronics into a single rugged unit, suitable for harsh industrial environments.
Technical Specifications
| Parameter | Value |
|---|---|
| Sensitivity | 3.94 mV/mm/s (100 mV/in/s) ±5% |
| Frequency Response | 4.5 Hz to 5 kHz (±3.0 dB), 6.0 Hz to 2.5 kHz (±0.9 dB) |
| Velocity Range | 1270 mm/s (50 in/s) peak |
| Amplitude Linearity | ±2% to 152 mm/s (6 in/s) peak |
| Transverse Sensitivity | <5% of sensitivity |
| Noise Floor | 0.004 mm/s (160 μin/s) rms |
| Mounted Resonant Frequency | >12 kHz |
| Output Bias Voltage | -12 ±3.0 VDC |
| Operating Temperature | -55°C to +121°C (-67°F to +250°F) |
| Shock Survivability | 5,000 g peak |
| Humidity | Up to 100% (non-submerged) |
| Diameter | 25.3 mm (0.995 in) |
| Height | 63.2 mm (2.49 in) |
| Weight | 0.142 kg (5.0 oz) |
| Material | 316L stainless steel |
| Connector | 2-pin Mil-C-5015 hermetically-sealed |
| Mounting Torque | 32–46 kg·cm (24–40 in-lb) max |
Applications
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Monitoring bearing housing and casing vibration
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Industrial turbines, compressors, pumps, and fans
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Suitable for marine, offshore, and hazardous areas
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Ideal for permanent and semi-permanent installations
Key Advantages
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Solid-state design with no moving parts eliminates mechanical wear
-
Wide frequency and velocity range for accurate vibration monitoring
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Hermetically-sealed stainless steel case for harsh environments
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Compatible with a wide range of mounting adaptors and cables
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Certified for hazardous area use (ATEX, IECEx, CSA)
Frequently Asked Questions (FAQ)
Q1: What type of signal does the 330500-03-05 output?
A1: It outputs a voltage proportional to vibration velocity (100 mV/in/s).
Q2: Is it suitable for use in hazardous environments?
A2: Yes, it meets ATEX, IECEx, CSA, and DNV certifications.
Q3: Can it be mounted in any orientation?
A3: Yes, vertical, horizontal, or any angled orientation is acceptable.
Q4: What is the sensor’s noise floor?
A4: 0.004 mm/s (160 µin/s) RMS over 4.5 Hz to 5 kHz.
Q5: What cable length can be used without signal degradation?
A5: Up to 305 meters (1,000 feet) using Bently Nevada cable P/N 02173006.
Q6: What is the shock survivability rating?
A6: 5,000 g peak.
Q7: Does the sensor require grounding?
A7: The case is electrically isolated to minimize grounding issues.
Q8: What is the purpose of the mounting torque specification?
A8: To ensure consistent sensor performance and signal integrity.
Q9: Can this sensor measure displacement?
A9: No, it measures velocity. Integrating for displacement may introduce noise.
Q10: Is this model compatible with older Bently Nevada monitors?
A10: Yes, it can be used with standard Bently Nevada monitoring systems.
Related Models (Same Series or Function)
| Model Number | Description | Frequency Range | Sensitivity |
|---|---|---|---|
| 330500-00-01 | Standard Velomitor with 1/2-20 UNF mount | 4.5 Hz to 5 kHz | 100 mV/in/s |
| 330500-00-02 | M8 x 1 thread version | 4.5 Hz to 5 kHz | 100 mV/in/s |
| 330525-01-00 | With 1/4-18 NPT mounting | 4.5 Hz to 5 kHz | 100 mV/in/s |
| 330500-03-01 | CSA/US/C certified model | 4.5 Hz to 5 kHz | 100 mV/in/s |
| 330500-03-02 | ATEX approved version | 4.5 Hz to 5 kHz | 100 mV/in/s |
| 330500-03-04 | Multiple certifications (CSA, ATEX) | 4.5 Hz to 5 kHz | 100 mV/in/s |
Popular Bently Nevada Models
| Model Number | Description | Application Type | Output Signal |
|---|---|---|---|
| 3300 XL 8mm Probe | Proximity Sensor | Shaft vibration/position | Voltage (mV/µm) |
| 3500/42M | Proximitor Seismic Monitor Module | Vibration Monitoring | Digital/Buffered |
| 3500/22M | Transient Data Interface Module | Data Acquisition | Ethernet/Buffered |
| 330104-00-06-10-11 | 3300 XL 8mm Proximity Probe | Rotating Machinery | 7.87 V/mm Sensitivity |
| 330180-91-CN | 3300 XL Proximitor Sensor | Proximity Vibration | Configurable |
| 330500-03-05 | Velomitor Piezo-velocity Sensor | Casing Vibration | 100 mV/in/ |
