Description
Providing reliable eddy current measurement for critical machinery protection, the Bently Nevada 330101-00-15-20-02-CN serves as a non-contact displacement sensor within the 3300 XL 8 mm series. Designed for high-frequency vibration and position monitoring, this metric probe converts shaft displacement into highly linear voltage signals when paired with a compatible 3300 XL Proximitor Sensor. The probe configuration features a 0.0-inch unthreaded length, a 1.5-inch overall case length, and a 2.0-meter total cable length ending in a miniature coaxial ClickLoc connector, certified with country-specific CN agency approvals for explosive atmospheres.
Features
- Miniature coaxial ClickLoc connector ensures a robust connection resistant to process area contaminants and accidental disconnection.
- Standard unarmored cable construction optimized for deployment within conduit and internal machine casings.
- Fully compliant with API 670 standards for machinery protection systems when integrated with standard Bently Nevada instrumentation.
- Thick-walled Ryton probe tip resistant to chemical attack and high thermal stress.
- CN approval option ensures local compliance for explosive gas and dust hazards.
Applications
- Radial vibration monitoring of high-speed steam and gas turbine shafts.
- Axial thrust position measurement on multi-stage centrifugal compressors.
- Eccentricity and phase reference (Keyphasor) detection on power generation machinery.
- Dynamic fluid-film bearing clearance analysis in heavy industrial pumps.
Ordering Code Breakdown
| Option Code |
Parameter Description |
Selected Value |
| 330101 |
Probe Model Type |
3300 XL 8 mm Proximity Probe, Metric (M10 x 1 Thread) |
| 00 |
Unthreaded Length |
0.0 in (0 mm) |
| 15 |
Overall Case Length |
1.5 in (38 mm) |
| 20 |
Total Cable Length |
2.0 meters (6.6 feet) |
| 02 |
Connector and Cable Type |
Miniature coaxial ClickLoc connector, standard cable |
| CN |
Agency Approvals |
Country-specific approvals (CN variant) |
Technical Specifications
| Manufacturer |
Bently Nevada |
| Probe Series |
3300 XL 8 mm |
| Thread Size |
M10 x 1 (Metric) |
| Scale Factor |
7.87 V/mm (200 mV/mil) when combined with compatible Proximitor |
| Linear Range |
2.0 mm (80 mils) starting at 0.25 mm (10 mils) from the face |
| Operating Temperature Range |
|
Connector Material |
Gold-plated brass with Ryton insulator |
| Minimum Bend Radius |
25.4 mm (1.0 in) for standard cable |
| Country of Origin |
U.S.A. |
| Net Weight |
0.323 kg (0.71 lbs) |
| Shipping Weight (Calculated) |
1.500 kg (3.30 lbs) |
Empirical Engineering Insights
Alternative Models & Compatibility
This 2.0-meter probe is engineered for systems configured for total lengths of either 5.0 meters or 9.0 meters. To operate within calibration specs, a 5.0-meter system requires a 3.0-meter extension cable, whereas a 9.0-meter system requires a 7.0-meter extension cable. Under no circumstances should probe cables and extension cables of differing system lengths (e.g., 5.0m extension mixed with 9.0m Proximitor) be cross-matched, as this will result in severe scale factor errors.
Application Pitfalls & Engineering Notes
When threading the M10 case into bracket mounts, ensure there is a minimum target clearance of 16 mm (twice the probe diameter) from adjacent metallic objects to prevent side-view cross-talk. Ground loops are a common source of industrial noise in proximity systems; ensure the coaxial connector connection is insulated from machine ground inside the junction box using the supplied connector protector sleeves.
Commissioning & Wiring Tips
Always verify the physical mechanical gap using a feeler gauge or a digital voltmeter reading raw bias voltage from the Proximitor prior to final locknut tightening. Standard gap voltage should read approximately -10 VDC when centered in the linear range on a standard 4140 steel target.
Installation Guidelines
CRITICAL WARNING: Verify the machine is completely de-energized, stationary, and locked out before inserting or adjusting the probe. Do not exceed the maximum installation torque of 4.5 N-m (40 in-lb) on the M10 locknuts. Overtightening will distort the internal coil assembly, causing permanent sensor failure.
1
Mount the bracket securely to the machine casing or internal structural member, ensuring zero deflection under high-vibration conditions.
2
Thread the M10 sensor body into the mounting bracket until the probe tip lightly touches the target shaft, then back it out to establish the required mechanical offset gap.
3
Tighten the locknuts to the specified torque. Connect the 2.0-meter probe cable to the extension cable, ensuring the ClickLoc connection is fully snapped into place.
4
Apply protective silicone tape over the connector assembly to seal out lube oils and environmental moisture.