Product Core Brief
- Model: 330105-02-12-05-02-05
- Brand: Bently Nevada (Baker Hughes)
- Series: 3300 XL 8 mm Proximity Transducer System
- Core Function: Non-contact eddy-current reverse-mount probe that measures shaft relative vibration, axial position, and keyphasor reference.
- Product Type: 8 mm reverse-mount proximity probe
- Key Specs: M10×1 thread | Non-armored | 1.2 in unthreaded length | 0.5 in case length | 0.5 m cable | 200 mV/mil sensitivity | Multi-license approval
- Condition: New Surplus / Factory New (confirm label, approval marking, and probe tip condition before procurement)
Product Introduction
The Bently Nevada 330105-02-12-05-02-05 is a 3300 XL 8 mm reverse-mount proximity probe used in eddy-current shaft vibration and displacement measurement systems. It works together with a 3300 XL extension cable and a 3300 XL Proximitor sensor to form a complete transducer system.
The model code breaks down as follows:
| Segment | Value | Meaning |
|---|---|---|
| Base model | 330105 | 3300 XL 8 mm reverse-mount probe, M10×1 thread, non-armored |
| Unthreaded length | 02 | 0.2 in unthreaded length |
| Case length | 12 | 1.2 in overall case length |
| Total length | 05 | 0.5 m (1.6 ft) cable length |
| Sensitivity | 02 | Standard 200 mV/mil (7.87 V/mm) |
| Approval | 05 | Multi-license approval |
This probe is typically installed on fluid-film bearing machinery such as steam turbines, centrifugal compressors, gas turbines, generators, and large pumps. It measures the gap between the probe tip and the rotating shaft surface, producing a voltage signal proportional to that gap. The system can monitor shaft radial vibration, axial thrust position, eccentricity, and keyphasor reference.
The 330105 is the reverse-mount version with an M10×1 metric thread. It should be paired with a matching 3300 XL extension cable and Proximitor sensor of the same system length.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | 3300 XL 8 mm reverse-mount proximity probe |
| Brand | Bently Nevada (Baker Hughes) |
| Model | 330105-02-12-05-02-05 |
| Thread | M10×1 |
| Armor | Non-armored |
| Unthreaded Length | 0.2 in |
| Overall Case Length | 1.2 in |
| Cable Length | 0.5 m (1.6 ft) |
| Sensitivity | 200 mV/mil (7.87 V/mm) |
| Linear Range | Approximately 2 mm (80 mils) for 8 mm probes |
| System Compatibility | 3300 XL 8 mm extension cable + Proximitor sensor |
| Approval | 05 (Multi-license approval) |
| Typical Applications | Shaft vibration, axial displacement, keyphasor, eccentricity |
Exact connector type, cable length compatibility, and approval markings should be confirmed against the product label and OEM documentation.
Quality Control Process (DYNAMIC GENERATION)
- Part-number verification: Confirm 330105-02-12-05-02-05 on the probe label or packaging.
- Visual inspection: Check the probe body, cable jacket, and connector for cracks, crushing, or chemical damage.
- Probe tip inspection: Verify the sensing face is free of scratches, coating damage, or contamination.
- Connector check: Inspect the ClickLoc or compatible connector for pin damage, seal integrity, and thread condition.
- Continuity test: Verify probe coil resistance and cable continuity if test equipment is available.
- System match check: Confirm the probe, extension cable, and Proximitor sensor share the same system length and approval requirements.
Replacement Pitfall Guide (DYNAMIC GENERATION)
❗ Do not confuse 330105 with 330103 or 330106. 330103 is the standard forward-mount M10×1 non-armored probe, 330105 is the reverse-mount M10×1 non-armored probe, and 330106 is the reverse-mount M10×1 armored probe. Using the wrong mounting type or armor type may prevent installation.
❗ Verify the unthreaded length and case length. The “02-12” means 0.2 in unthreaded length and 1.2 in overall case length. Substituting different lengths may change the mechanical fit in the probe holder or bracket.
❗ Match the system length. The probe, extension cable, and Proximitor sensor must form a consistent system length (0.5 m, 1.0 m, 5.0 m, or 9.0 m). Mixing different system lengths can degrade linearity and accuracy.
❗ Confirm the approval suffix. The 05 approval option denotes multi-license approval (CSA, ATEX, IECEx). Replacing it with a different approval code (e.g., 00 or CN) may affect regional certification or hazardous-area compliance requirements.
❗ This is not a casing vibration transmitter. The 330105 measures shaft relative vibration, not casing vibration. It should not be substituted for 177230 seismic transmitters or velocity sensors.
❗ Check the gap voltage during installation. For 8 mm probes, the typical target gap voltage is approximately −10.0 VDC. Incorrect gap setting will cause measurement errors or false alarms.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Alternative | Compatibility Level | Migration Notes |
|---|---|---|---|
| Bently Nevada 330105-02-12-05-02-05 | Same 330105-02-12-05-02-05 | Direct | Match full order code, unthreaded/case length, and approval. |
| Bently Nevada 330105-02-12-05-02-00 | 330105-02-12-05-02-05 | Needs Verification | Different approval option; confirm multi-license requirement. |
| Bently Nevada 330105-02-12-10-02-05 | 330105-02-12-05-02-05 | Needs Verification | Different cable length (1.0 m vs. 0.5 m); verify system compatibility. |
| Bently Nevada 330106-05-30-05-02-05 | 330105-02-12-05-02-05 | Not direct | 330106 is armored; 330105 is non-armored. |
| Bently Nevada 330103-00-04-05-02-05 | 330105-02-12-05-02-05 | Not direct | 330103 is forward-mount; 330105 is reverse-mount. |
Benchmarks:
- 3300 XL 8 mm reverse-mount proximity probe for shaft relative vibration and displacement.
- M10×1 thread, non-armored construction.
- 0.2 in unthreaded length, 1.2 in overall case length.
- 0.5 m cable length.
- 200 mV/mil (7.87 V/mm) sensitivity with approximately 2 mm linear range.
- Multi-license approval (option 05).
- Must be used with matching 3300 XL extension cable and Proximitor sensor.
- Third-party listings that describe 330105 as a velocity sensor, 4–20 mA transmitter, or casing vibration sensor are incorrect.
