Bently Nevada 330104-02-07-90-02-00 – Non-Contact Eddy-Current Proximity Transducer System | 3300 XL Series Platform
Engineering Background
The Bently Nevada 330104-02-07-90-02-00 is a complete eddy-current proximity transducer system engineered for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion in rotating machinery. Designed as part of the industry-standard 3300 XL Series, this system integrates a probe, extension cable, and Proximitor® sensor into a calibrated, matched assembly that delivers ±1% full-scale accuracy across the full operating temperature range.
Product Positioning
Targeted at reliability engineers, rotating equipment specialists, and procurement teams operating turbines, compressors, pumps, and motors in oil & gas, power generation, petrochemical, and heavy industrial facilities. The 330104-02-07-90-02-00 is a direct OEM replacement for legacy 3300 XL installations and is fully compatible with Bently Nevada 3500 Series monitoring racks.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 330104-02-07-90-02-00 |
| Series / Platform | Bently Nevada 3300 XL |
| Sensor Type | Eddy-Current Proximity Transducer (Non-contact) |
| Probe Tip Diameter | 5 mm (0.197 in) |
| Nominal Gap Range | 0.25 – 2.25 mm (10 – 90 mil) |
| Linear Range | 1.0 mm (40 mil) typical |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Extension Cable Length | 5 m (16.4 ft) |
| Armored Cable | No (Standard) |
| Connector Type | Standard BN 3-pin |
| Operating Temperature | –35°C to +121°C (–31°F to +250°F) |
| Supply Voltage | –24 VDC (nominal) |
| Output Voltage Range | –2 VDC to –18 VDC |
| Frequency Response (–3 dB) | DC to 10,000 Hz |
| Target Material | AISI 4140 Steel (standard) |
| Ingress Protection | IP67 |
| Agency Approvals | CE, FM, CSA (Intrinsically Safe options available) |
| Weight | Approx. 230 g (probe + cable assembly) |
| Compatible Monitor | Bently Nevada 3500 Series, 3300 Series |
Proven Application Environments
- Steam & Gas Turbines – Shaft radial vibration and axial position monitoring per API 670
- Centrifugal Compressors – Real-time rotor orbit and differential expansion measurement
- Boiler Feed Pumps – Continuous bearing clearance monitoring in high-temperature environments
- Electric Motors (>500 kW) – Non-contact rotor eccentricity detection
- Gearboxes & Expanders – Thrust position and case vibration trending
- Offshore & Subsea Platforms – Rated for salt-fog and high-humidity environments
Engineering Advantages
- Matched System Calibration – Probe, cable, and Proximitor® are factory-calibrated as a matched set; no field re-calibration required on direct replacement
- Wide Bandwidth (DC–10 kHz) – Captures sub-synchronous, synchronous, and high-frequency vibration components in a single channel
- Temperature Stability – Thermally compensated design maintains scale factor accuracy across –35°C to +121°C without drift correction
- API 670 Compliant – Meets the 5th Edition standard for machinery protection systems in critical rotating equipment
- Plug-and-Play Replacement – Identical form, fit, and function to original 3300 XL installations; no wiring or rack modifications required
- IP67 Sealing – Suitable for wash-down, high-humidity, and outdoor installations
System Architecture & Signal Flow
The 330104-02-07-90-02-00 operates as a three-component eddy-current system:
- Probe (330104) – Generates a high-frequency electromagnetic field (typically 1 MHz) at the tip. As the conductive target (shaft) moves within the field, eddy currents are induced, altering the probe’s impedance.
- Extension Cable (330130-XX-XX) – Transmits the RF signal between probe and Proximitor® with controlled impedance. The 5 m length in this configuration is pre-matched to the probe.
- Proximitor® Sensor (330180-X1-CN) – Demodulates the RF signal and outputs a DC voltage proportional to gap distance at 7.87 V/mm (200 mV/mil). Output feeds directly into Bently Nevada 3500/40M or 3500/42M monitor cards.
Signal output is a negative DC voltage: –2 VDC at minimum gap (0.25 mm) to –18 VDC at maximum gap (2.25 mm), with the linear measurement range centered at approximately –10 VDC (1.27 mm / 50 mil nominal gap).
Sourcing & Quality Verification
- Origin: Genuine Bently Nevada (Baker Hughes) OEM components
- Condition: New surplus / refurbished-to-OEM-spec (clearly stated per unit at time of order)
- Traceability: Each unit ships with original part label, date code, and Konmask inspection certificate
- Testing: 100% functional bench-test at nominal –24 VDC supply; scale factor verified against NIST-traceable reference gap standard
- Packaging: Anti-static foam insert, moisture-barrier bag, OEM-style carton with probe tip protection cap
Procurement Process
- Add to cart and submit your order on Konmask.com
- Our engineering team confirms part number, condition, and lead time within 1 business day
- Pro-forma invoice issued for wire transfer or credit card payment (L/C accepted for orders >USD 5,000)
- Ships via DHL Express / FedEx International Priority with full tracking and commercial invoice
- Typical lead time: 3–7 business days for in-stock units; 2–4 weeks for sourced units
- 30-day DOA warranty; extended warranty available on request
Technical FAQ
Q: Is this a matched system or can I mix probe and cable from different part numbers?
A: The 330104-02-07-90-02-00 is a factory-matched system. Mixing components from different calibration sets will shift the scale factor and void API 670 compliance. Always replace as a complete matched assembly.
Q: What is the difference between -90- and -91- in the part number suffix?
A: The -90- designates a standard (non-armored) extension cable. The -91- suffix indicates an armored cable for high-abrasion or high-vibration routing environments. Electrically and functionally identical.
Q: Can this probe be used with a 3500/25 Keyphasor® module?
A: Yes. The 330104 probe is compatible with Keyphasor® applications when the target notch geometry meets BN specifications (1× per revolution, minimum notch width 6 mm).
Q: What target materials are supported?
A: AISI 4140 steel is the calibration standard. Other ferromagnetic and non-ferromagnetic targets (Inconel, titanium, aluminum) require a target material correction factor — contact our engineering team for recalibration data.
Q: Do you provide a calibration certificate?
A: Yes. A Konmask functional test report is included. OEM factory calibration certificates are available for new-in-box units where original documentation is intact.
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