Product Core Brief
- Model: 330105-02-12-10-02-CN
- Brand: Bently Nevada (Baker Hughes)
- Series: 3300 XL 8mm Sensor System
- Core Function: Non-contact eddy current proximity probe for continuous radial vibration, axial displacement, and keyphasor measurement on rotating machinery.
- Product Type: Eddy Current Vibration / Displacement Probe
- Key Specs: 8mm Diameter | 2mm Linear Range | 7.87 V/mm Sensitivity
- Condition: New Surplus / OEM Original
Bently 330105-02-12-10-02-CN
Key Technical Specifications
- Sensor Type: 8mm Eddy Current Probe
- Linear Range: 2 mm (79 mils)
- Sensitivity: 7.87 V/mm (200 mV/mil)
- Frequency Response: 0 to 10 kHz
- Recommended Gap Setting: 1.27 mm (-10 VDC typical)
- Minimum Recommended Shaft Diameter: 76.2 mm (3 inches)
- Connector Type: Micro ClickLoc Coaxial
- Operating Temperature: -52°C to +177°C (Standard)
- Protection Rating: IP66
- Compliance: API 670 Standard
- Suffix Note: “-CN” indicates Greater China regional certification/compliance
Product Introduction
Serving as the primary sensing element in the Bently Nevada 3300 XL machinery protection ecosystem, this 8mm eddy current probe provides nanometer-level resolution for shaft dynamic and static position monitoring. Utilizing high-frequency electromagnetic field modulation, it detects rotor imbalances, misalignment, bearing wear, and axial shifts before they escalate into catastrophic failures.
This specific model features a 1.0-meter integrated cable with a Micro ClickLoc connector, designed for secure, vibration-resistant mating with the extension cable. The “-CN” suffix confirms compliance with regional market requirements, making it ideal for power generation, petrochemical, and heavy industrial applications across the Greater China region.
QA & Testing SOP
Vibration probes are highly sensitive to physical damage and electrical degradation. We verify mechanical and electrical integrity before release.
- Anti-Counterfeit & Visual Audit: We inspect the stainless steel housing for corrosion, verify the Bently Nevada laser etching, and check the Micro ClickLoc connector for bent center pins or damaged locking threads.
- Cable Continuity & Shield Test: We perform a low-resistance sweep on the coaxial core and verify the braided shield has zero breaks, ensuring EMI noise won’t corrupt the microvolt-level vibration signals.
- Impedance & Sensitivity Validation: Using an OEM test rig, we verify the probe’s electrical characteristics match the 7.87 V/mm sensitivity spec and confirm the linear range is free from dead zones.
- Connector Mating Test: We mate the ClickLoc connector with a standard extension cable to verify it locks securely and maintains consistent electrical contact under simulated vibration.
- ESD Safe Packaging: The internal coil assembly is sensitive to static discharge. We pack the probe in anti-static shielding with desiccant to prevent latent dielectric breakdown.
Bently 330105-02-12-10-02-CNBently Nevada 330105-02-12-10-02-CN
Installation Pitfalls & Guide
❗ System Length Matching: This probe has a 1.0m integrated cable. When paired with a 4.0m extension cable (e.g., 330130-040-00-05), the total system length is 5.0m. You must use a 5m system Proximitor transmitter (e.g., 330180-50-xx). Mismatched system lengths will cause severe calibration errors and false trips.
❗ Gap Voltage Calibration: The recommended initial gap is 1.27 mm, which typically corresponds to -10 VDC at the transmitter output. Never guess the gap; always use a multimeter to verify the exact DC voltage during installation. An incorrect gap pushes the sensor out of its linear range, causing clipped waveforms and false alarms.
❗ Single-Point Grounding: The coaxial shield must be grounded at the Proximitor transmitter end only. Grounding at both the probe and transmitter creates a ground loop that injects 50/60Hz hum directly into your vibration readings.
Replacement SOP:
- Pre-Install: Record the existing gap voltage and alarm setpoints; place the machine in bypass/maintenance mode.
- Removal: Disconnect the extension cable; unthread the old probe from the bracket; clean the mounting hole.
- Install: Thread the new 330105 probe into the bracket; connect the extension cable; route away from high-EMI sources (VFDs, motor leads).
- Power-On Test: Apply power to the Proximitor; adjust the probe gap until the output reads -10 VDC ± 0.2V; verify DCS vibration readings are stable before removing bypass.
Technical FAQ
What does the “-CN” suffix mean?
The “-CN” suffix indicates that the probe meets specific regulatory, certification, or market compliance requirements for the Greater China region. Functionally and electrically, it is identical to the standard “-05” (multi-agency approval) variant and is fully interchangeable in any 3300 XL system.
Can I use this probe for high-temperature applications like gas turbines?
This is a standard temperature probe rated to +177°C (+350°F). If your application exceeds this (e.g., steam turbines, gas turbines with hot lube oil), you should upgrade to the Extended Temperature Range (ETR) probe, such as the 330191-02-12-10-CN, which is rated to +218°C (+425°F).
What is the minimum shaft diameter for accurate measurement?
Bently Nevada recommends a minimum target shaft diameter of 76.2 mm (3 inches) for the 8mm probe to ensure the eddy current field is fully contained and the calibration remains accurate. For smaller shafts, consider using a 5mm or 11mm probe system.
Is this compatible with 3500/42M and 3300/16 monitors?
Yes. This probe is part of the universal 3300 XL 8mm sensor system. It connects via the extension cable and Proximitor transmitter to any compatible monitor, including the 3500/42M, 3500/40, 3300/16, and 1900/65A.
Why is this sold as new surplus?
This unit was pulled from sealed OEM overstock or an unfulfilled project before installation. We perform full electrical validation on our test rigs, but we aren’t replacing the internal coil or re-calibrating the sensitivity. You are getting unused factory components with original manufacturing tolerances at a fraction of the active OEM list price.
