Product Core Brief
- Model: 330500-02-00
- Brand: Bently Nevada
- Series: 330500 Velomitor Piezo-Velocity Sensor
- Core Function: Measures absolute (relative-to-free-space) casing vibration on bearing housings, gearboxes, and structural components, outputting a velocity-proportional signal for condition monitoring and protection.
- Product Type: Piezo-Velocity Sensor
- Key Specs: 100 mV/in/s sensitivity | M8×1 mounting thread | no special agency approval | 2-pin connector
- Condition: New Original / New Surplus
Product Introduction
The Bently Nevada 330500-02-00 is a Velomitor piezo-velocity sensor designed for absolute casing vibration measurement. Unlike traditional moving-coil velocity sensors, it uses an integrated piezoelectric accelerometer with internal signal conditioning to produce a velocity output, eliminating wear-prone mechanical parts and allowing installation in any orientation—vertical, horizontal, or inclined.
This variant carries an M8×1 mounting thread (code 02) and no special agency approval (code 00). With a sensitivity of 100 mV/in/s (3.94 mV/mm/s) and a broad frequency range, it is commonly used on rolling-element bearing machines, gearboxes, fans, and pumps where casing velocity is the preferred vibration metric. It interfaces directly with Bently Nevada 3500-series monitors configured for velocity/accelerometer inputs, such as the 3500/42M.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Bently Nevada |
| Part Number | 330500-02-00 |
| Product Family | 330500 Velomitor Piezo-Velocity Sensor |
| Sensitivity | 100 mV/in/s (3.94 mV/mm/s) ±5% |
| Frequency Range | 4.5 Hz to 5 kHz ±3.0 dB (standard band) |
| Mounting Thread | M8×1 (code 02) |
| Agency Approval | 00 – No special approval specified |
| Connector | 2-pin |
| Max Cable Length | Up to 305 m (1,000 ft) |
| Output Type | Velocity-proportional voltage |
| Compatible Monitors | 3500/42M, 3500/44M, and other Bently Nevada monitors supporting ICP/velocity input |
| Typical Applications | Bearing housing vibration, gearbox casing monitoring, fan/pump structural vibration |
Key Selling Points & Differentiators
- No moving parts. Piezoelectric design eliminates mechanical wear, improving long-term reliability over traditional velocity sensors.
- Omni-directional mounting. Can be installed vertically, horizontally, or at any angle without performance degradation.
- Long cable runs supported. Up to 305 m cable length enables flexible installation in large plants.
- Exact thread match. The M8×1 thread (code 02) matches metric mounting holes—critical for direct replacement without adapter plates.
- Broad frequency coverage. 4.5 Hz to 5 kHz captures both low-speed and high-frequency casing vibration signatures.
- Direct 3500 compatibility. Works with Bently Nevada 3500 monitors supporting velocity/accelerometer inputs.
Quality Transparency SOP
- Part number verification. We confirm the label reads 330500-02-00 and matches the 330500 Velomitor family.
- Thread inspection. The M8×1 mounting thread is checked for stripping, galling, or contamination.
- Connector inspection. The 2-pin connector is verified for bent pins, corrosion, or loose shells.
- Continuity and insulation check. Using a Fluke multimeter, we verify pin-to-pin insulation and absence of short circuits.
- ESD-safe packing. The sensor is sealed in an anti-static bag and foam-packed to prevent connector or housing damage.
Technical Risk Avoidance
❗ Confirm mounting thread before ordering. Code “02” is M8×1. If your equipment uses 1/2-20 UNF, 1/4-28 UNF, or other thread standards, a different variant is required.
❗ Verify approval requirements for hazardous areas. The “00” code indicates no special agency approval. Do not install in Zone 2 / Division 2 areas unless the physical label explicitly permits it.
❗ Ensure proper mounting surface preparation. The sensor must be mounted on a clean, flat, rigid surface. Poor mounting—such as loose bolts, uneven surfaces, or excessive paint—will distort the vibration signal.
❗ Confirm monitor input compatibility. The 330500 outputs a velocity-proportional voltage signal and requires a monitor channel configured for velocity/accelerometer input (e.g., 3500/42M). It is not compatible with eddy-current proximitor channels.
❗ Avoid low-frequency displacement integration. While the sensor can technically be integrated to displacement, signal distortion increases at low frequencies. Use caution when deriving displacement from velocity output.
❗ Do not confuse with 330525 or 330750. The 330525 is an enhanced environmental protection variant (IP65/NEMA 4X), and the 330750 is a high-temperature variant. This 330500-02-00 is the standard industrial version.
Buyer’s FAQ
Is this the same as a 330180 proximitor? No. The 330500 is a casing vibration velocity sensor, while the 330180 is an eddy-current proximitor for shaft relative vibration and displacement. They serve different measurement purposes and connect to different monitor channels.
Can I replace a 330500-01-00 with this? Not without checking the mounting thread. The -01- variant uses 1/2-20 UNF thread, while the -02- variant uses M8×1. The electrical characteristics are the same, but mechanical fit differs.
Can I replace a 330500-02-05 with this? Electrically they are identical. The difference is the approval code: -00 has no special agency approval, while -05 carries multi-license approval. Confirm whether your installation requires certified approval.
Does this require a separate signal conditioner? No. The Velomitor has integrated signal conditioning and outputs a velocity-proportional voltage directly. It connects directly to a compatible Bently Nevada monitor channel.
Is this genuine Bently Nevada? Yes. We sell genuine surplus inventory. The part number is verified against the physical label before dispatch.
What warranty applies? Standard 12-month warranty against DOA and functional defects. Damage from incorrect mounting, thread mismatch, chemical exposure, or improper monitor configuration is not covered.
