Overview
Configured for shaft displacement measurement in Bently Nevada 3300 machinery monitoring systems, the Bently Nevada 330103-00-07-20-02-CN (330103 3300 XL 8 mm Proximity Probe) provides direct eddy-current signal conversion for rotor vibration and axial position monitoring.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330103-00-07-20-02-CN |
| Brand | Bently Nevada |
| Product Type | 3300 XL 8 mm Proximity Probe |
| Origin | USA |
| Weight | 0.08 kg |
| Dimensions | 19.3 x 18.6 x 1.5 cm estimated shipping size |
| Operating Temp | -51 deg C to +177 deg C |
| Power Consumption | Passive eddy-current probe, powered by compatible proximity system driver |
| Measurement Technology | Eddy-current non-contact displacement sensing |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 304 stainless steel |
| Thread Type | M10 x 1 metric thread |
| Linear Range | 2.0 mm (80 mils) |
| Incremental Scale Factor | 7.87 V/mm nominal (200 mV/mil) |
| Frequency Response | 0 Hz to 10 kHz (+0, -3 dB) |
| Target Material | AISI 4140 steel |
| Cable Type | 75 ohm coaxial cable with CableLoc design |
| Total Cable Length | 2.0 m |
| Connector Type | Gold-plated miniature coaxial ClickLoc connector |
| Connector Configuration | Option -02 standard ClickLoc connector without fluid-blocking jacket |
| Cable Pull Strength | 330 N (75 lbf) probe case-to-probe lead strength |
| Agency Approval | CN configuration for China market requirements |
Eddy-Current Scaling and Rotor Dynamics Interface
The 330103-00-07-20-02-CN uses eddy-current probe scaling to convert shaft displacement into a proportional voltage output. The probe operates with compatible Bently Nevada proximity sensor drivers that establish the required electrical gap relationship between the probe tip and the conductive target.
During installation, technicians validate the probe gap voltage, typically targeting approximately -10 VDC at the normal operating position. This validation confirms the mechanical clearance and signal conversion range before machinery operation.
The probe supports rotor dynamics analysis by providing displacement signals required for vibration monitoring, shaft orbit evaluation, axial position measurement, and machine protection logic within Bently Nevada monitoring architectures.
Frequently Asked Questions
Q: What type of measurement signal does the 330103-00-07-20-02-CN provide?
A: The probe provides an analog displacement signal generated through eddy-current interaction between the probe tip and a conductive shaft target.
Q: Does the probe require direct power input?
A: No. The probe operates as part of an eddy-current transducer system and receives excitation from a compatible Bently Nevada proximity driver.
Q: What installation factors affect measurement accuracy?
A: Correct probe gap adjustment, target material compatibility, cable routing, shielding practices, and mechanical mounting stability affect signal accuracy.
Field Installation Guidelines
- Install the probe with the specified M10 x 1 mounting thread and maintain mechanical alignment with the monitored shaft surface.
- Verify that the target surface matches the calibrated AISI 4140 steel reference condition.
- Adjust the probe position according to the proximity driver gap voltage requirement before commissioning.
- Route the coaxial cable away from high-current power conductors to reduce electrical interference.
- Connect cable shielding according to the machinery monitoring system grounding practice.
- Inspect the ClickLoc connector engagement and ensure the connector remains free from contamination.
- Confirm the probe signal output and gap voltage before enabling machinery protection functions.
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