Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330801-28-04-050-00-02 |
| Brand | Bently Nevada |
| Product Type | 3300 XL 11 mm Proximity Probe |
| Origin | USA |
| Weight | Not specified |
| Dimensions | 11 mm probe tip diameter; 3/8-24 UNF thread; 4.0 inch case length |
| Operating Temp | Probe tip and cable: -52 deg C to +177 deg C |
| Power Consumption | Supplied by compatible 3300 XL Proximitor Sensor; power consumption not specified |
| Series | 3300 XL 11 mm Proximity Transducer System |
| Measurement Type | Eddy-current non-contact displacement measurement |
| Primary Application | Shaft vibration, radial position, axial thrust position, and Keyphasor speed measurement |
| Probe Tip Diameter | 11 mm (0.43 inch) |
| Thread Specification | 3/8-24 UNF-2A |
| Unthreaded Length | 2.8 inch (71 mm) |
| Overall Case Length | 4.0 inch (102 mm) |
| Total Cable Length | 5.0 m (16.4 ft) |
| Connector Type | Miniature coaxial ClickLoc connector with fluid leakage barrier |
| Linear Range | 4.0 mm (160 mils) |
| Initial Gap Range | Approximately 0.5 mm (20 mils) from target face |
| Nominal Scale Factor | 3.94 V/mm (100 mV/mil) with matching 3300 XL 11 mm Proximitor Sensor |
| Calibration Target Material | AISI 4140 steel |
| Pressure Rating | Probe tip sealed up to 7.0 bar (100 psi) |
| Agency Approvals | ATEX / IECEx / CSA intrinsically safe and non-incendive approvals |
Eddy-Current Signal Scaling and Rotor Dynamics Monitoring
The 330801-28-04-050-00-02 uses eddy-current measurement technology to convert shaft displacement into an electrical signal proportional to probe gap distance. When paired with the correct 3300 XL 11 mm Proximitor Sensor, the system provides calibrated gap voltage output for rotor vibration and position monitoring.
The 11 mm probe configuration provides a 4.0 mm linear measurement range with a nominal scale factor of 100 mV/mil. Gap voltage validation is performed through the Proximitor Sensor output, where a typical operating reference uses negative DC voltage proportional to the probe-to-shaft clearance. Correct probe, cable, and sensor length matching is required to maintain calibration accuracy and rotor dynamics measurement performance.
The probe assembly is configured as a 5.0 m system length component. It must be connected to a 3300 XL 11 mm Proximitor Sensor configured for the same system length without additional extension cable.
Frequently Asked Questions
Q: Can the 330801-28-04-050-00-02 be connected to an 8 mm Proximitor Sensor?
A: No. The probe is designed for the 3300 XL 11 mm Proximitor Sensor family. Using an incompatible sensor size or system length will cause incorrect calibration and measurement errors.
Q: Does this probe require an extension cable for a 5.0 m system installation?
A: No. The probe cable length is 5.0 m and fulfills the complete system length requirement when paired with a matching 3300 XL 11 mm Proximitor Sensor.
Q: What type of signal does the probe generate?
A: The probe provides an eddy-current displacement signal that is converted by the Proximitor Sensor into a proportional voltage output representing shaft gap, vibration, or position.
Field Installation Guidelines
- Install the probe with the specified 3/8-24 UNF mounting thread and maintain correct mechanical alignment with the monitored shaft surface.
- Verify that the probe tip clearance is within the calibrated operating range before commissioning.
- Use only a matching 3300 XL 11 mm Proximitor Sensor configured for a 5.0 m system length.
- Avoid routing probe cables parallel to high-current power conductors to reduce electrical interference.
- Maintain proper cable shielding and grounding practices according to the machinery protection system installation requirements.
- Confirm the target shaft material matches the calibration reference requirements. The standard calibration target material is AISI 4140 steel.
- Inspect the ClickLoc connector interface to ensure correct mechanical engagement and prevent contamination or fluid ingress.
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