The Bently Nevada 330104-00-18-10-01-00 represents the industry's most trusted solution for non-contact displacement and vibration monitoring. This 3300 XL 8mm proximity probe tracks the microscopic movements of rotating shafts in high-criticality assets, such as steam turbines, centrifugal compressors, and large-scale industrial motors. By utilizing advanced eddy current technology, the sensor captures both radial vibration and axial position data without physical contact, ensuring zero mechanical wear and long-term signal stability even in high-speed applications.
Operating as a fundamental sensing element for Turbine Supervisory Instrumentation (TSI), this probe identifies early mechanical instabilities like shaft unbalance, misalignment, or bearing degradation. It delivers a high-fidelity voltage signal proportional to the gap between the probe tip and the target surface, enabling plant operators to implement sophisticated predictive maintenance. Its ruggedized design ensures consistent performance in the punishing environments typical of oil, gas, and power generation sectors.
The model 330104-00-18-10-01-00 follows a modular engineering logic. Each segment of the part number dictates the mechanical fit and electrical compatibility of the sensor:
The 00 indicates a 0.0-inch unthreaded length. This configuration provides a fully threaded probe body (3/8-24 UNF), allowing for maximum installation stability and flexibility when mounting through thick brackets or machine casings.
This designates an 1.8-inch overall case length. The 330104 threaded housing provides a secure mechanical anchor, ensuring the probe remains stable under high-vibration conditions within the machine housing.
The -10 specifies a 1.0-meter (approx. 3.3 feet) total probe lead length. In the 3300 XL ecosystem, the probe lead must be paired with the correct extension cable to match the Proximitor’s total system calibration (typically 5.0m or 9.0m) to maintain the precise 200 mV/mil scale factor.
The 01 option signifies a miniature coaxial ClickLoc connector without a connector protector. The 00 indicates standard global agency approvals, certifying the unit for safe operation in general industrial environments.
| Feature | Specification Details |
| Probe Tip Diameter | 8.0 mm (0.315 in) |
| Linear Range | 2.0 mm (80 mils) |
| Nominal Sensitivity (ISF) | 7.87 V/mm (200 mV/mil) |
| Target Material | AISI 4140 Steel (Standard Calibration) |
| Operating Temperature | -51 °C to +177 °C (-60 °F to +351 °F) |
| Thread Size | 3/8-24 UNF-2A |
| Pressure Rating | Sealing up to 70 psi (4.8 bar) |
| System Length | 1.0 Meter (Probe only) |
Successful machinery protection depends on precise gapping and meticulous cable management during the installation process:
Engineers must set the initial "Static Gap" using a Digital Multimeter (DMM). For a 3300 XL 8mm system, the center of the linear range corresponds to -10.0 VDC. Adjust the probe depth until the Proximitor output reaches this value while the shaft remains at its rest position before tightening the locknuts.
Coaxial leads are sensitive to physical deformation. Maintain a minimum bend radius of 25.4 mm (1.0 inch). Protect the cable using flexible conduit to prevent mechanical damage and avoid running probe leads parallel to high-voltage AC lines to prevent electromagnetic interference (EMI) from corrupting the vibration signal.
The probe is calibrated for AISI 4140 steel. If the target shaft uses a different alloy, the scale factor (sensitivity) will shift. Ensure the target area is free from scratches, rust, or magnetic inclusions (runout), as the sensor will interpret these surface imperfections as actual vibration.
High-Performance PPS Tip: The probe tip utilizes Polyphenylene Sulfide (PPS), a high-performance thermoplastic that resists chemical corrosion and maintains structural integrity across extreme temperature cycles.
API 670 Compliance: The 3300 XL series meets or exceeds the American Petroleum Institute (API) 670 standards for machinery protection systems, ensuring global interoperability and safety.
Gold-Plated ClickLoc Connectors: Gold-plated contacts ensure low-resistance signal transmission and prevent oxidation, a critical feature for high-humidity environments.
Exceptional Interchangeability: The system allows for 100% interchangeability between probes, extension cables, and Proximitor sensors of the same electrical length, simplifying spare parts inventory and reducing maintenance downtime.
Q1: Does this probe provide a 4-20mA output?
A1: No. This is a common misconception. Proximity probes provide a raw analog voltage signal (typically 200 mV/mil). If your system requires a 4-20mA signal, you must connect the probe to a 3300 XL Proximitor that is specifically configured for 4-20mA output, or use a 3500 rack monitor.
Q2: Can I use this 1.0m probe with a standard 5.0m system?
A2: Yes, provided you pair it with a 4.0-meter extension cable. The total electrical length (Probe + Cable) must equal the calibration of the Proximitor (e.g., 5.0m total) to maintain the correct 200 mV/mil sensitivity.
Q3: Is this probe compatible with Ethernet communication?
A3: No. The probe is a passive analog sensor. While some databases mistakenly list "Ethernet router" services, the 330104 probe provides a raw analog signal. Digital or network communication only occurs at the 3500 Monitoring Rack level.
Q4: How do I verify the health of the 330104 probe?
A4: Measure the DC resistance between the center pin and the outer shield of the coaxial connector. A healthy 1.0m probe lead typically reads between 5.0 Ω and 9.0 Ω. An infinite reading indicates an open circuit, requiring probe replacement.
