Bentley 330102-00-16-05-02-00 Electromagnetic Eddy Current Probe Product Description

I. Product Overview

330102-00-16-05-02-00 is a 3300 XL 8mm armored eddy current probe under the Bently Nevada brand, belonging to the front-end sensing unit of the 3300 XL sensor system. It must be combined with the same series extension cable and preamplifier to form a complete measurement chain. The product adopts an ultra-short housing and a fully armored stainless steel structure, suitable for extremely narrow installation spaces and harsh industrial environments. Based on the eddy current effect, it realizes non-contact high-precision measurement for shaft vibration, axial displacement, phase angle, and rotational speed monitoring of rotating machinery. It complies with the API 670 industry standard and has the characteristics of compact structure, high protection level, stable measurement, and strong anti-interference ability. It is widely used in large-scale unit condition monitoring in the power, petrochemical, metallurgical, coal chemical, and other fields.

II. Basic Information

Model: 330102-00-16-05-02-00

Brand: Bently Nevada

Series: 3300 XL 8mm Eddy Current Sensor System

Type: Armored Proximity Eddy Current Probe (330102 is the armored version, different from 330101 standard version)

Thread Specification: 3/8-24 UNF American fine thread

Model Code Meaning: 00 indicates no exposed thread section; 16 indicates the total length of the housing is 1.6 inches (ultra-short housing, suitable for extremely compact spaces); 05 indicates the probe's built-in cable length is 0.5 meters; 02 indicates the micro ClickLoc coaxial connector, standard cable; 00 indicates no special configuration

Structural Features: Stainless steel armored housing, high mechanical strength, resistant to bending, compression, and oil mist and moisture; patented TipLoc forming process, the probe end is firmly bonded to the housing; the cable adopts CableLoc design, with a tensile strength of up to 330N

Connector Type: Micro ClickLoc coaxial connector, reliable connection, convenient plugging and unplugging, strong protection

Certifications: CE, UL, compatible with industrial safety and electromagnetic compatibility standards (no explosion-proof certification)

Protection Level: IP65 (probe body), suitable for oil mist, dust, and water vapor conditions

Compatible Systems: 3300 XL full series preamplifiers (such as 330100 series), 3500/3300 TSI systems

III. Electrical and Mechanical Parameters

Electrical Parameters

Sensitivity: 7.87V/mm (200mV/mil), linear error ≤ ±1%

Linear Range: 2.0mm (80mil), effective range 0.25mm–2.3mm

Output Signal: Cooperates with preamplifier to output -1VDC to -17VDC standard DC voltage

Frequency Response: 0–10kHz (+0/-3dB), covering the full vibration frequency band of rotating machinery

Probe DC Resistance: 7.59Ω ± 0.50Ω (0.5 meter cable)

Minimum Target Diameter: 8.9mm (0.35 inches), recommended shaft diameter ≥ 50.8mm (2 inches)

Environmental Parameters

Probe Working Temperature: Standard -52℃ to +177℃; High-temperature version can reach +218℃

Storage Temperature: -52℃ to +260℃

Relative Humidity: 5%–95% (no condensation)

Interference Resistance: Complies with CE EMI/RFI standards, tolerant to variable frequency drives, motors, etc. strong electromagnetic interference

Mechanical Parameters

Total Housing Length: 1.6 inches (ultra-short housing, suitable for narrow installation holes) Installation Torque: Recommended 1.1–1.4 N·m. Avoid damage to the threads.

Cable Bending Radius: ≥ 5 times the cable diameter. To prevent the armor layer from breaking.

IV. Core Functions

1. Non-contact Precision Measurement

Based on the eddy current effect, the end coil of the probe receives the high-frequency excitation signal of 0.5–2 MHz from the preamplifier, generating an alternating magnetic field; when close to the metal shaft, the surface of the shaft induces eddy currents, reversing the impedance of the coil, and in combination with the preamplifier, converting it into a linear voltage signal, accurately reflecting the change in the gap between the probe and the shaft, achieving synchronous measurement of static displacement and dynamic vibration.

2. Armor Protection and High Reliability

The entire structure adopts a stainless steel armor, with integrated protection for the probe body, cable, and connector. It can withstand on-site oil mist, water vapor, dust, and mechanical collisions, suitable for harsh working conditions such as compressors and steam turbines; patented TipLoc and CableLoc designs enhance the connection strength at the end and the cable, ensuring no signal drift during long-term operation and a long average downtime.

3. Wide Temperature Stability and Temperature Compensation

Built-in high-temperature coils and insulating materials, combined with the system's automatic temperature compensation circuit, operate within a wide temperature range of -52°C to +177°C, with sensitivity stability ≤ ±1.5%, capable of withstanding temperature fluctuations in the working conditions, ensuring accurate long-term monitoring data.

4. Ultra-Short Shell Design and Quick Installation

1.6-inch ultra-short shell is suitable for equipment side walls, compact brackets, and other narrow positions where conventional probes cannot be installed. The standard 3/8-24 UNF thread is compatible with universal installation bases; the micro ClickLoc connector can be quickly plugged and unplugged without tools, and probes, extension cables, and preamplifiers can be interchanged on-site without re-calibration, reducing maintenance downtime.

5. Fault Diagnosis and System Adaptation

Combined with the preamplifier, it realizes self-check of line faults, identifying issues such as probe breakage, short circuit, and cable damage, and outputs fault signals for alarm; compatible with 3500/3300 TSI systems, PLCs, and DCSs, supporting real-time data collection, over-limit alarms, and fault recording.

V. Working Principle

The core of the probe is the high-frequency coil at the end. The preamplifier injects high-frequency alternating current into the coil, generating a stable alternating magnetic field; when the probe approaches a rotating metal shaft (conductor), the magnetic field induces a closed eddy current on the shaft surface, the reverse magnetic field changes the inductance and impedance of the probe coil; the probe transmits the impedance change signal to the preamplifier, which converts it into a standard DC voltage signal at a fixed ratio of 7.87V/mm, with a voltage closer to -17V for larger gaps and closer to -1V for smaller gaps, accurately measuring dynamic parameters such as shaft vibration and axial displacement.

VI. Installation and Wiring Requirements

Installation Position: Vertically installed on the radial or axial direction of the measured shaft, with the end of the probe parallel to the shaft surface, avoiding measurement errors caused by inclination; the installation area should be away from strong magnetic fields and heating elements to reduce interference.

Gap Setting: Recommended to set at the midpoint of the linear range (approximately 1.27mm), corresponding to -9VDC output from the preamplifier, for optimal linearity and stability.

Thread Installation: Screw the 3/8-24 UNF thread into the base, with torque controlled at 1.1–1.4 N·m, to avoid over-tightening and damaging the threads or squeezing the cable.

Cable Layout: The armored cable bending radius should be ≥ 5 times the cable diameter to avoid sharp-angle bending; separate wiring from power cables to prevent electromagnetic interference; the total length should strictly match the 0.5-meter specification, and cannot be随意cut.

Connector Connection： Align the micro ClickLoc connector with the slot and insert it， hearing a "click" sound to lock， ensuring the connection part is dust-proof and collision-resistant， with stable signal transmission.

VII. Typical Application Scenarios Electric power industry: Monitoring of shaft vibration and axial displacement for steam turbine generators, feedwater pumps, induced draft fans, and exhaust fans to prevent rotor friction and bearing wear; suitable for extremely compact installation locations.

Petrochemical industry: Condition monitoring for centrifugal compressors, gas turbines, process pump sets, and mixing units to ensure continuous production and predict shaft system failures; preferred for non-explosive ordinary areas.

Metallurgical industry: Monitoring of vibration and displacement for blast furnace fans, large transmission motors, and rotating components of rolling mills to avoid equipment overload damage.

Industrial drives: Measurement of key phase, speed, and eccentricity for large motors and high-speed rotating equipment to provide data for dynamic balance correction and fault diagnosis.

TSI system support: As the front-end sensing component of the 3300 XL system, it is equipped with a preamplifier and monitoring card to build a safety protection and condition monitoring system for rotating machinery.

VIII. Product Advantages

Ultra-short armored design: 1.6-inch housing is suitable for narrow spaces, with stainless steel armor and IP65 protection, capable of withstanding harsh conditions.

High precision and stability: 7.87V/mm standard sensitivity, small linear error, strong wide-temperature stability, meeting API 670 high-precision requirements.

High protection joints: Micro ClickLoc joints, dust-proof and impact-resistant, suitable for complex on-site environments.

Easy maintenance and interchangeability: Components can be interchanged, allowing for quick on-site replacement without calibration; joints can be plugged and unplugged without tools, simplifying maintenance procedures.

Long service life: Industrial-grade materials resistant to high temperatures and aging, tested under harsh conditions, supporting 7×24-hour continuous operation.