Bentley 330102-00-40-10-01-00 Electromagnetic Eddy Current Probe Product Description

I. Product Overview

330102-00-40-10-01-00 is a 3300 XL 8mm armored eddy current probe under the brand name Bently Nevada of Baker Hughes. It is the core sensing component of the 3300 XL sensor system and requires an extension cable and a preamplifier to form a complete monitoring chain. The product features a 3/8-24 UNF standard thread and an armored stainless steel protective structure, specifically designed for harsh industrial environments. It is used for non-contact high-precision measurement of shaft vibration, axial displacement, key phase, and rotational speed of rotating machinery, in accordance with API 670 industry standards. It has the characteristics of stable measurement, strong anti-interference, and wide temperature tolerance, and is widely used in large-scale unit condition monitoring in power, petrochemical, and metallurgical industries.

II. Basic Information

Model: 330102-00-40-10-01-00

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 standard fine thread

Model Code Meaning: 00 represents no thread length of 0 inches; 40 represents the total length of the housing 4.0 inches; 10 represents the total length of the probe's built-in cable 1 meter; 01 represents the micro ClickLoc coaxial connector with a protective cap and standard cable; 00 represents no special configuration certification

Structural Features: Stainless steel armored housing, high mechanical strength, resistant to bending, compression, and oil mist and water vapor; 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 with a protective cap, reliable connection, convenient plugging and unplugging, strong protection

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

Protection Grade: IP65 (probe body), compatible with 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 (1 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 strong electromagnetic interference from frequency converters and motors

Mechanical Parameters

Total Length of Shell: 4.0 inches (suitable for shallow installation holes, preferred for compact spaces)

Cable Specification: 1 meter stainless steel armored cable, resistant to oil, aging, and mechanical damage

Installation Torque: Recommended 1.1–1.4N・m, avoid damage to the thread Cable bending radius: ≥ 5 times the cable diameter to prevent the armor layer from breaking

IV. Core Functions

1. Non-contact precise 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 body, 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 gap change between the probe and the shaft, achieving synchronous measurement of static displacement and dynamic vibration.

2. Armor protection and high reliability

The overall structure adopts a stainless steel armor, and the cable and connector are integrated for protection. It can withstand on-site oil mist, water vapor, dust, and mechanical collisions, suitable for harsh working conditions such as compressors and steam turbines; the patented TipLoc and CableLoc designs strengthen the connection strength at the end and the cable, with no signal drift during long-term operation, and an average downtime of more than 10,000 hours.

3. Wide temperature stability and temperature compensation

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

4. Compact design and rapid installation

The 4.0-inch short housing is suitable for narrow installation spaces, and the standard 3/8-24 UNF thread is compatible with universal installation bases; the micro ClickLoc connector with a protective cover can be quickly plugged and unplugged without tools, providing stronger protection; probes, extension cables, and preamplifiers of the same specification can be interchanged on-site without secondary calibration, reducing maintenance downtime.

5. Fault diagnosis and system compatibility

Combined with the preamplifier, it realizes self-check of the line faults, identifying issues such as probe breakage, short circuit, and cable damage, and outputting fault signals for alarm; compatible with 3500/3300 TSI systems, PLCs, and DCSs, supporting real-time data acquisition, 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 the rotating metal shaft (conductor), the magnetic field induces a closed eddy current on the shaft surface, the reverse magnetic field generated by the eddy current will change 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, the end of the probe is 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: It is recommended to set at the midpoint of the linear range (approximately 1.27mm), corresponding to -9VDC output from the preamplifier, achieving the best linearity and stability.

Thread installation: Screw the 3/8-24 UNF thread into the base, with a torque control of 1.1–1.4N・m, avoiding over-tightening and damaging the thread or squeezing the cable.

Cable laying: The armored cable has a bending radius of ≥ 5 times the cable diameter to avoid sharp corner bending; separate wiring from power cables to prevent electromagnetic interference; the total length must strictly match the 1-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， the connector protector ensures the connection part is dustproof and resistant to impact， and the signal transmission is stable.

VII. Typical Application Scenarios

Power industry： Axial vibration and axial displacement monitoring of steam turbine generator sets， feedwater pumps， induced draft fans， and exhaust fans to prevent rotor friction and bearing wear； suitable for compact installation positions. Petrochemical industry: Condition monitoring for centrifugal compressors, gas turbines, process pump sets, and mixing units to ensure continuous production and predict shaft failures; preferred for non-explosive ordinary areas.

Metallurgical industry: Vibration and displacement monitoring for blast furnace fans, large transmission motors, and rotating components of rolling mills to prevent equipment overload damage.

Industrial drives: Phase angle, speed, and eccentricity measurement 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

Compact armored design: 4.0-inch short housing suitable for narrow spaces, stainless steel armored 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 connectors: ClickLoc connectors with protectors, dust-proof and impact-resistant, suitable for complex on-site environments.

Easy maintenance and interchangeability: Components can be interchanged, quick on-site replacement without calibration; connectors 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.