The Bently Nevada 330104-00-07-10-02-CN stands as a cornerstone in high-fidelity vibration monitoring, specifically engineered for the 3300 XL series. This 8 mm proximity probe utilizes eddy current technology to provide non-contact, high-precision measurements of shaft vibration and position. Designed for the most critical rotating assets—including steam turbines, centrifugal compressors, and large scale pumps—it translates physical displacement into a reliable electrical signal for the Proximitor Sensor.
This specific "CN" variant reflects Bently Nevada's commitment to global compliance, meeting localized certification standards essential for the Chinese industrial sector. It delivers sub-micron resolution even in the harshest environments, ensuring plant operators can detect the earliest signs of mechanical fatigue or instability before they escalate into catastrophic failures.
The 3300 XL probe system follows a specific alphanumeric logic. Here is the configuration breakdown for the 330104-00-07-10-02-CN model:
330104: Defines the 3300 XL 8 mm Proximity Probe with M10 x 1 thread (Metric).
00: Unthreaded Length — Indicates a 0 mm unthreaded portion (fully threaded body).
07: Overall Case Length — Specifies a 70 mm total case length.
10: Total Length — Indicates a 1.0 meter (3.3 feet) cable length.
02: Connector and Cable Option — Includes miniature coaxial connector with connector protector.
CN: Agency Approval — Denotes localized Chinese certifications for hazardous area installations.
| Parameter | Specification |
| Probe Tip Diameter | 8.0 mm (0.315 in) |
| Linear Range | 2.0 mm (80 mils), starting at approx. 0.25 mm (10 mils) |
| Sensitivity (ISF) | 7.87 V/mm (200 mV/mil) ± 6.5% |
| Operating Temperature | -52°C to +177°C (-62°F to +351°F) |
| Input Voltage Range | -17.5 Vdc to -26 Vdc (via Proximitor) |
| Linearity Error | Less than ±0.0254 mm (±1 mil) |
| Minimum Shaft Diameter | 15.2 mm (0.6 in) |
| Ingress Protection | IP68 (Probe tip and case) |
Successful condition monitoring depends on precise physical installation. Follow these engineering guidelines for the 330104 series:
Ensure the probe achieves the "Sweet Spot" of the linear range. For most 3300 XL systems, set the physical gap to represent a voltage of -10.0 Vdc at the Proximitor output when the shaft is at its rest position. This ensures maximum headroom for both vibration and thermal growth tracking.
Maintain a minimum bend radius of 25.4 mm (1.0 in). Avoid over-tightening zip ties, which can crush the coaxial core and alter the impedance, leading to signal "noise" or false trips. Always use the included connector protectors to prevent moisture ingress at the junction.
The 3300 XL probe is calibrated for AISI 4140 steel. If your target shaft uses a different alloy (e.g., stainless steel or chrome-moly), the scale factor will shift. Contact our technical team for custom calibration curves if monitoring non-standard metallurgy.
Exceptional Thermal Stability: The 330104 probe maintains linear accuracy across extreme temperature swings, preventing "false alarms" caused by thermal drift in gas turbine housings.
Interchangeability: The 3300 XL system allows for the replacement of probes, extension cables, and sensors without requiring individual component calibration, drastically reducing maintenance MTTR (Mean Time To Repair).
Chemical Resistance: The polyphenylene sulfide (PPS) probe tip is resistant to most industrial lubricants and corrosive gasses, ensuring a service life often exceeding 10 years in continuous operation.
TSI Integration: Designed for seamless "Plug-and-Play" connectivity with Bently Nevada 3500 and 3300 monitoring racks, the global standard for Turbine Supervisory Instrumentation.
Q1: What does the "CN" suffix specifically imply for this model?
A1: The "CN" suffix indicates that the probe complies with Chinese national standards (GB/T) for electrical equipment in explosive atmospheres. It ensures the product meets local regulatory requirements for import and installation within hazardous industrial zones in China.
Q2: Can I use this probe with a 5 mm or 11 mm Proximitor Sensor?
A2: No. The 330104 is an 8 mm probe and must be paired with a 3300 XL 8 mm Proximitor Sensor. Using mismatched diameters will result in incorrect scale factors and non-linear data.
Q3: How do I verify if the probe is functioning correctly before installation?
A3: Use a static calibrator (Spindle Micrometer) and a regulated power supply. Measure the voltage output at 0.25 mm increments; you should see a consistent change of approximately 200 mV per mil (0.025 mm) of movement within the linear range.
Q4: Is the 330104-00-07-10-02-CN compatible with older 3300 (non-XL) systems?
A4: Yes, the 3300 XL 8 mm components are backward compatible with non-XL 3300 8 mm components. However, for optimum performance and reduced EMI susceptibility, we recommend upgrading the entire loop to the XL standard.
