Description

The BENTLY NEVADA 330104-00-05-10-02-CN is an 8 mm eddy current proximity probe engineered for high-accuracy measurement of shaft displacement, vibration, and position in rotating machinery. As part of the industry-standard 3300 XL 8 mm system, it delivers exceptional linearity, stability, and noise immunity—making it a trusted sensor in power generation, oil & gas, and heavy industrial applications.

This specific model features:

5-meter (16.4 ft) integrated coaxial cable

Reverse-mount configuration (connector at sensing end, ideal for tight spaces)

M10×1 metric thread for secure installation

Stainless steel housing rated for extreme temperatures and corrosive environments

Designed to meet API 670 requirements for machinery protection, the 330104-00-05-10-02-CN must be used with compatible Bently Nevada extension cables (e.g., 330130) and driver modules (e.g., 3300 XL 8 mm前置器) to form a calibrated measurement system.

Application Scenarios

At a 1.600 MW combined-cycle power plant in Texas, a gas turbine experienced recurring high-vibration alarms during startup. Traditional accelerometers couldn’t distinguish between mechanical imbalance and thermal bow—leading to unnecessary inspections. Engineers installed BENTLY NEVADA 330104-00-05-10-02-CN probes on both bearing housings, configured for radial shaft displacement monitoring. The reverse-mount design allowed installation through limited-access ports near the compressor casing. Within days, trend data revealed a classic “bow signature”: high runout at low speed that decayed as the rotor warmed. Operators adjusted warm-up curves, eliminating false trips. “The 330104 didn’t just measure movement—it told us why it was moving,” said the vibration analyst. This precision prevented two scheduled outages, saving over $ 1.2M in lost generation.

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Technical Principles and Innovative Values

Innovation Point 1: True Reverse-Mount Design for Space-Constrained Installations

Unlike standard probes (connector at rear), the 330104-00-05-10-02-CN places the connector at the sensing tip—allowing the probe body to extend into deep bores while the cable exits radially. Critical for modern compact turbines.

Innovation Point 2: System-Calibrated Accuracy

Each probe is laser-trimmed and tested with its designated extension cable and driver—ensuring ±0.25% full-scale linearity across temperature and frequency.

Innovation Point 3: Immunity to Conductive Contaminants

The eddy current field penetrates oil films and light carbon deposits without signal drift—unlike optical or capacitive sensors.

Innovation Point 4: API 670 Compliance Out of the Box

Meets all requirements for machinery protection systems, including redundancy support, fail-safe diagnostics, and environmental resilience.

Application Cases and Industry Value

In a Middle Eastern LNG compression train, journal bearing wear caused gradual shaft centerline shift—undetectable by velocity sensors. After installing BENTLY NEVADA 330104-00-05-10-02-CN probes on all four compressors, operators began trending DC gap voltage. Over six months, a 0.15 mm drift in one unit signaled impending babbitt fatigue. The machine was shut down during planned maintenance—avoiding a catastrophic seizure that could have cost $ 20M+ in repairs and downtime. The reliability manager stated: “The 330104 gave us eyes inside the bearing—something no other sensor could do.”

Related Product Combination Solutions

BENTLY 330130-XX-XX-X: 3300 XL extension cable (must match probe length code)

BENTLY 3300/16-XX-XX: 8 mm前置器 (Proximitor™ driver)—converts probe signal to -2 to -18 V DC

BENTLY 3500/42: 4-channel monitor module—accepts input from 330104 for alarm/trip logic

BENTLY 1900/65A: Portable analyzer—for on-demand validation of 330104 readings

GE Mark VIe: Can integrate 330104 signals via analog input cards for hybrid protection

SKF Microlog AX: Alternative handheld—but lacks continuous protection capability

BENTLY 330101-XX-XX-XX: Standard (non-reverse) 8 mm probe—for open-access installations

Baker Hughes System 1: Full machinery health platform—uses 330104 data for AI-driven diagnostics

Installation, Maintenance, and Full-Cycle Support

Installing the BENTLY NEVADA 330104-00-05-10-02-CN requires precise axial alignment and proper gap setting (typically 1.27 mm / 50 mils). Use a feeler gauge or calibration fixture during cold alignment. Torque to 7–10 Nm to avoid thread galling. The reverse-mount design demands careful routing of the 5m cable to prevent strain at the connector.

Critical best practices:

Always use genuine Bently Nevada extension cables—impedance mismatch causes signal ringing.

Verify system calibration using a TK3-2 or TK3-3 calibrator before commissioning.

Ground the probe shield at one end only (usually the monitor end) to avoid ground loops.

Maintenance involves quarterly visual inspection for oil ingress or mechanical damage, and annual calibration checks. If DC bias voltage drifts >±0.2 V, investigate probe wear or cable degradation.

Our technical team provides full lifecycle support—from probe selection and mounting kit design to on-site commissioning and failure analysis. Every 330104-00-05-10-02-CN we supply is traceable to original Bently Nevada calibration records. We offer 24-month warranty and access to certified vibration specialists.