Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330709-000-060-50-02-00 |
| Base Model | 3300 XL 11 mm |
| Brand | Bently Nevada |
| Manufacturer | Baker Hughes / Bently Nevada |
| Product Type | 3300 XL 11 mm Proximity Probe |
| Dimensions | 60 mm case length; M16 x 1.5 threaded case |
| Operating Temp | -51 deg C to +177 deg C |
| Power Consumption | Passive probe; power is provided by the compatible Proximitor Sensor |
| Unthreaded Length | 0.0 mm |
| Overall Case Length | 60 mm |
| Integral Cable Length | 5.0 m |
| Connector Type | Miniature coaxial ClickLoc connector |
| Cable Type | Standard integral cable |
| Agency Approval | -00, standard / no agency approval specified |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 304 stainless steel |
| Measurement Principle | Eddy-current non-contact displacement measurement |
| Measurement Targets | Conductive metallic targets |
| Typical Applications | Radial vibration, axial position, shaft displacement, and speed measurement |
| Nominal Scale Factor | 3.94 V/mm (100 mV/mil) |
| Linear Range | Typically 2.0 mm to 5.0 mm, depending on calibration and installation |
| Temperature Range | -51 deg C to +177 deg C |
Eddy-Current Measurement and Gap Voltage
The probe operates as part of an eddy-current measurement chain with a compatible Proximitor Sensor. The sensor converts the probe-target distance into an electrical voltage proportional to displacement.
For Bently Nevada machinery monitoring installations, technicians should validate the probe gap voltage during commissioning. A typical nominal target for Bently Nevada proximity systems is approximately -10 VDC, subject to the applicable Proximitor Sensor and system specification.
The 3300 XL 11 mm probe uses a nominal scale factor of 3.94 V/mm. Therefore, the monitoring system can derive shaft displacement from the electrical output after proper probe calibration and gap adjustment.
Frequently Asked Questions
Q: Is the 330709-000-060-50-02-00 probe a standalone powered sensor?
A: No. The probe forms the sensing element of an eddy-current proximity system and requires a compatible Proximitor Sensor for excitation and signal conditioning.
Q: What does the 5.0 m cable option specify?
A: The -50 configuration specifies a 5.0 m integral cable connected to the probe assembly through the specified ClickLoc arrangement.
Q: Can the probe directly measure shaft vibration?
A: Yes. When installed against a suitable conductive shaft target and connected to compatible monitoring electronics, the probe provides displacement information used to calculate radial vibration.
Field Installation Guidelines
- Install the probe perpendicular to the intended measurement surface unless the machinery design specifies another orientation.
- Maintain the specified mechanical clearance and target geometry required by the applicable 3300 XL installation documentation.
- Verify probe gap voltage after mechanical installation and before accepting vibration measurements.
- Route the coaxial cable away from high-current power conductors, variable-frequency drive wiring, and other strong electromagnetic noise sources.
- Avoid sharp bends, crushing, excessive tension, or mechanical abrasion along the integral cable.
- Connect the probe to the correct compatible Proximitor Sensor and verify connector engagement before operation.
- Maintain appropriate cable shielding and grounding practices according to the monitoring system installation documentation.
- Check the shaft target surface for suitable electrical conductivity and mechanical condition before commissioning.
- Confirm the probe response and scaling against the configured monitoring channel before placing the machinery into service
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