Overview
Configured for non-contact measurement of shaft displacement and vibration, the Bently Nevada 330104-00-040-10-02-05 (330104 3300 XL 8 mm Proximity Probe) provides direct eddy-current measurement between the probe tip and a conductive rotating target.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330104-00-040-10-02-05 |
| Base Model | 330104 |
| Brand | Bently Nevada |
| Series | 3300 XL 8 mm Proximity Transducer System |
| Product Type | 8 mm Eddy-Current Proximity Probe |
| Probe Tip Diameter | 8 mm |
| Thread | M10 x 1 metric |
| Armor | Stainless steel armor |
| Unthreaded Length | 0 mm |
| Case Length | 40 mm |
| Total System Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc connector |
| Cable Type | Standard coaxial cable |
| Agency Approvals | CSA, ATEX, IECEx intrinsic safety |
| Linear Range | 2.0 mm (80 mils) |
| Operating Measurement Range | Approximately 0.25 mm to 2.3 mm (10 to 90 mils) |
| Incremental Scale Factor | 7.87 V/mm (200 mV/mil) nominal, +/-5% |
| Operating Temperature | -52 deg C to +177 deg C (-61 deg F to +350 deg F) |
| Dimensions | 8 mm tip diameter; 40 mm case length; 1.0 m total system length |
Eddy-Current Measurement and Gap Voltage
The 330104 probe operates as the sensing element of an eddy-current proximity transducer system. The probe establishes an electromagnetic field at its tip and responds to the distance between the probe and the conductive target.
The resulting electrical output varies with the physical probe-to-target gap. Therefore, the same measurement chain can represent static shaft position and dynamic shaft vibration.
For system verification, technicians can validate the probe and Proximitor interface against the specified gap-voltage relationship. The supplied data identifies a nominal incremental scale factor of 7.87 V/mm (200 mV/mil) with a +/-5% tolerance.
The ClickLoc connector uses a positive-locking mechanism. Consequently, the coaxial connection remains mechanically secured during normal equipment vibration.
Frequently Asked Questions
Q: What measurement range does the 330104-00-040-10-02-05 support?
A: The specified linear range is 2.0 mm (80 mils), with an operating range of approximately 0.25 mm to 2.3 mm (10 to 90 mils).
Q: What is the nominal incremental scale factor?
A: The nominal ISF is 7.87 V/mm (200 mV/mil), with a specified tolerance of +/-5%.
Q: What connector does this probe use?
A: It uses a miniature coaxial ClickLoc connector with standard coaxial cable.
Field Installation Guidelines
- Install the probe with its M10 x 1 metric threaded body correctly engaged in the mounting arrangement.
- Maintain the specified probe-to-target gap during mechanical setup and commissioning.
- Keep the probe cable separated from high-current power conductors and strong electromagnetic interference sources where practical.
- Route the coaxial cable without sharp bends, crushing, or excessive mechanical tension.
- Secure the cable to prevent movement that could transmit mechanical stress to the probe connector.
- Fully engage and lock the ClickLoc connector before commissioning the measurement channel.
- Where the installation uses hazardous-area certification, verify that the complete transducer circuit and associated interface comply with the applicable CSA, ATEX, or IECEx installation requirements.
- Verify the probe signal and gap relationship before placing the machinery protection or monitoring channel into service.
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