Bently Nevada 330903-00-21-05-01-00 Proximity Transducer System | Replacement, Equivalent & Selection Guide
The Bently Nevada 330903-00-21-05-01-00 is a precision eddy-current proximity transducer system from the industry-leading 3300 XL Series, designed for continuous vibration, position, and eccentricity monitoring of rotating machinery in critical industrial applications. Konmask.com supplies genuine and compatible units with full traceability for MRO and OEM procurement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 330903-00-21-05-01-00 |
| Series | Bently Nevada 3300 XL |
| Type | Eddy-Current Proximity Transducer System |
| Probe Cable Length | 5 m (standard) |
| Extension Cable Length | 1 m |
| Sensitivity | 7.87 V/mm (200 mV/mil) |
| Linear Range | 0.25 – 2.25 mm (10 – 90 mil) |
| Frequency Response | DC – 10,000 Hz |
| Supply Voltage | -24 VDC (nominal) |
| Output | -1 to -17 VDC |
| Operating Temperature | -35°C to +121°C (probe) |
| Connector Type | Armor-jacketed coaxial |
| Approvals | CE, ATEX (optional), CSA |
| Weight | ~300 g (system) |
Compatible Replacement & Equivalent Models
The following models are functionally compatible or direct replacements for the 330903-00-21-05-01-00. Always verify gap voltage, cable length, and driver compatibility before substitution.
| Model | Brand | Notes |
|---|---|---|
| 330903-00-21-10-02-00 | Bently Nevada | Same probe, 10 m extension cable |
| 330903-00-21-05-02-00 | Bently Nevada | Armored extension variant |
| 330905-00-21-05-01-00 | Bently Nevada | 3300 XL 8 mm probe, same driver |
| 3300 XL 11 mm Probe System | Bently Nevada | Wider linear range, same driver |
| PR6423/010-030 | Epro (GE) | Cross-compatible eddy-current system |
| CON021/916-000 | Epro (GE) | Driver equivalent for 3300 XL probes |
| TQ401/TQ402 | Metrix | Functional equivalent, verify sensitivity |
Why Choose the Original Model
- Factory-calibrated gap voltage and sensitivity — no field re-calibration required
- Matched system: probe, extension cable, and driver are factory-paired for optimal linearity
- Proven reliability in API 670-compliant machinery protection systems
- Full OEM traceability — serial number, calibration certificate, and country of origin documentation available
- Direct drop-in for existing 3300 XL monitor racks (3300/16, 3500/42, etc.)
Typical Applications
- Steam and gas turbine shaft vibration monitoring
- Compressor radial and axial position measurement
- Pump and motor eccentricity detection
- Gearbox and expander rotor dynamics
- Petrochemical, power generation, and LNG plant machinery protection
System Compatibility
The 330903-00-21-05-01-00 is designed to interface directly with the following Bently Nevada monitor systems:
- Bently Nevada 3300/16 Monitor
- Bently Nevada 3500/42 Proximitor I/O Module
- Bently Nevada 3500/40M Proximitor Monitor
- Bently Nevada ADRE 408 DSPi Data Acquisition
- Third-party systems accepting -24 VDC supply and -1 to -17 VDC output (verify driver impedance)
Selection Guide
Use the table below to select the correct 330903 variant for your application:
| Requirement | Recommended Model |
|---|---|
| Standard 5 m cable, non-armored | 330903-00-21-05-01-00 ✓ (this model) |
| 10 m extension cable needed | 330903-00-21-10-02-00 |
| Armored extension cable required | 330903-00-21-05-02-00 |
| Wider gap range (8 mm probe) | 330905-00-21-05-01-00 |
| ATEX Zone 1 hazardous area | Contact Konmask for ATEX-certified variant |
| Budget-sensitive / cross-brand | Epro PR6423 series (verify compatibility) |
Quality Assurance & Sourcing
- Source: Authorized distributor stock and certified MRO surplus
- Inspection: Each unit inspected for physical integrity, connector condition, and part number verification
- Documentation: Certificate of conformance, original packaging where available
- Warranty: 12-month warranty against manufacturing defects
- Lead Time: In-stock units ship within 1–3 business days; ex-stock lead time 2–4 weeks
How to Order
- Confirm part number: 330903-00-21-05-01-00
- Specify quantity and required documentation (CoC, datasheet, calibration record)
- Add to cart or contact support@konmask.com for bulk pricing and lead time
- For urgent requirements, call +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I use a 330903-00-21-10-02-00 in place of the 330903-00-21-05-01-00?
A: Yes, the only difference is the extension cable length (10 m vs 5 m). Ensure your installation has sufficient cable routing space.
Q: Is the Epro PR6423 a direct drop-in replacement?
A: Functionally compatible in most cases, but sensitivity and gap voltage must be verified against your monitor’s input specifications. Contact us for a compatibility check.
Q: Does this unit require re-calibration after installation?
A: No. Factory-matched systems are pre-calibrated. However, gap setting must be performed per OEM installation guidelines (typically 1.0–1.5 mm gap).
Q: Is this part available with ATEX certification?
A: ATEX-certified variants exist within the 3300 XL family. Contact Konmask for the correct ATEX part number for your hazardous area classification.
Q: What is the difference between 330903 and 330905?
A: The 330903 uses a standard probe diameter; the 330905 uses an 8 mm probe with a wider linear range, suitable for larger shaft diameters or higher eccentricity applications.
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