Bentley 330101-00-80-10-01-00 Electromagnetic Eddy Current Probe Detailed Description

I. Product Introduction

330101-00-80-10-01-00 is a full-length threaded non-armored eddy current probe of the 3300 XL 8mm series from Bently Nevada under Baker Hughes. It is the front-end sensing unit of the rotating machinery TSI condition monitoring system and must be combined with the same series extension cable and preamplifier to form a complete measurement chain. The product is designed with 0.0 inch non-threaded section + 8.0 inch long housing + 1 meter standard cable, suitable for deep hole, long-distance installation or situations requiring full-length threaded fixation. Based on the eddy current effect, it achieves non-contact high-precision measurement and is mainly used for radial shaft vibration, axial displacement, phase angle and rotational speed monitoring. It complies with API 670 industry standards and has the characteristics of stable structure, flexible installation, strong anti-interference and long-term stability, and is widely used in large-scale unit condition monitoring in conventional industrial areas such as power, petrochemical, and metallurgy.

II. Basic Information

Model: 330101-00-80-10-01-00

Brand: Bently Nevada

Series: 3300 XL 8mm Eddy Current Sensor System

Type: Standard non-armored proximity eddy current probe (330101 is non-armored version, different from 330102 armored version)

Thread Specification: 3/8-24 UNF American fine thread, full-length threaded design, firmly fixed

Model Code Meaning: 00 = 0.0 inch non-threaded section length (full-length threaded); 80 = total housing length 8.0 inches (long housing); 10 = probe's built-in cable length 1 meter; 01 = micro ClickLoc coaxial connector with protective cap, standard non-armored cable; 00 = no explosion-proof certification, conventional industrial configuration

Structural Features: The housing is made of AISI 303/304 stainless steel, the sensing end is made of high-temperature resistant PPS material; non-armored flexible cable, length 1 meter; patented TipLoc one-piece molding process, the end is firmly bonded to the housing, resistant to vibration loosening, full-length threaded suitable for deep hole and long-distance installation

Connector Type: Micro ClickLoc coaxial connector with protective cap, tool-free insertion and removal, reliable connection, good protection

Certification: CE, UL industrial safety and electromagnetic compatibility certification, no explosion-proof qualification, only applicable to non-flammable and non-explosive working conditions

Protection Grade: IP54 (probe body), suitable for dry, low dust, and non-corrosive environments

Compatible Systems: 3300 XL full series preamplifiers, 3300/3500 series TSI monitoring cards, compatible with mainstream PLC, DCS

III. Electrical Parameters

Sensitivity: 7.87V/mm (200mV/mil), full-scale linear error ≤ ±1%, full temperature range stability ≤ ±1.5%

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

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

Frequency Response: 0–10kHz (+0/-3dB), covers 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)

System Compatibility: Needs to be matched with 3300 XL preamplifier, total electrical length (probe cable + extension cable) needs to be consistent with the calibration length of the preamplifier,严禁随意裁剪 cable

IV. Environmental and Mechanical Parameters Environmental parameters

Operating temperature: -52°C to +177°C, can withstand +218°C for a short period of time

Storage temperature: -52°C to +260°C

Relative humidity: 5%–95% (no condensation), no strong corrosive gases

Interference resistance: Complies with CE EMI/RFI standards, can withstand strong electromagnetic interference from frequency converters and motors

Explosion-proof rating: No explosion-proof certification, only applicable to non-hazardous areas

Mechanical parameters

Length of non-threaded section: 0.0 inch (full-length thread, no smooth rod)

Total length of the housing: 8.0 inches (long housing, suitable for deep hole installation, long-distance installation)

Cable specification: 1-meter standard non-armored flexible cable, resistant to oil, aging, suitable for medium-distance laying

Installation torque: Recommended 1.1–1.4N・m, avoid damage to the thread or deformation of the housing

Cable bending radius: ≥3 times the cable diameter, prohibit sharp-angle bending, dragging

Weight: Approximately 0.25kg, the long housing design has strong rigidity, resistant to vibration, offset, with high anti-vibration stability

Five. Core functions

1. Non-contact precise measurement

Based on the eddy current effect, the end coil of the probe receives the 0.5–2MHz high-frequency excitation signal from the preamplifier, generating an alternating magnetic field; when close to the metal shaft, the surface of the shaft is induced with eddy currents, reversing the impedance of the coil, combined with the preamplifier to convert it into a linear voltage signal, accurately reflecting the change in the gap between the probe and the shaft, simultaneously collecting static displacement and dynamic vibration signals, with nanometer-level accuracy, without mechanical wear.

2. Full-length thread + long housing suitable for deep hole installation

0.0 inch non-threaded section (full-length thread) + 8.0 inches long housing, specially designed for deep hole, long-distance measurement points or scenarios requiring continuous thread fixation; the stainless steel long housing has strong rigidity, resistant to vibration, deformation, no loosening during long-term operation, high installation coaxiality, more stable fixation method.

3. 1-meter standard cable suitable for conventional distance transmission

1-meter non-armored flexible cable, suitable for medium-distance connection scenarios between the probe and the preamplifier / extension cable, flexible wiring; flexible material facilitates space bending and laying, maintaining the original length to ensure impedance matching, cannot be cut.

4. Wide temperature stability and temperature compensation

Built-in high-temperature coil and insulating materials, combined with the system's automatic temperature compensation circuit, in the -52°C to +177°C wide temperature range, the sensitivity fluctuation is ≤±1.5%, suppresses temperature drift, ensures stable long-term monitoring data.

5. Fault self-check and rapid maintenance

Can be coordinated with the matching preamplifier to achieve line fault detection, accurately identify probe breakage, short circuit, cable damage, poor contact of the connector, etc., output dedicated fault voltage signal, trigger alarm; probes, extension cables, and preamplifiers of the same specification can be interchanged, on-site replacement does not require recalibration, shortens downtime.

Six. Working principle

The sensing coil inside the probe is supplied with high-frequency alternating current to form a stable electromagnetic field, the electromagnetic field penetrates the air gap and acts on the measured metal shaft, generating a closed eddy current on the metal surface; the intensity of the eddy current changes with the gap between the probe and the shaft, inversely affecting the electrical parameters such as the inductance and impedance of the probe coil; the probe transmits the changing signal to the preamplifier, the preamplifier converts it into a continuous DC voltage at a ratio of 7.87V/mm, the voltage is closer to -17VDC when the gap is larger, closer to -1VDC when the gap is smaller; the upper-level system parses the voltage value, converts it into parameters such as shaft vibration, axial displacement, speed, phase, etc., achieving online monitoring and safety protection of the equipment state.

Seven. Installation and laying specifications

Installation position: Vertically installed on the radial or axial direction of the measured shaft, the end face of the probe is parallel to the shaft surface, avoiding measurement errors caused by inclination; when installing in a deep hole, ensure the hole is clean, free of debris, gradually screw in the full-length thread, avoiding jamming. Gap setting: It is recommended to set at the midpoint of the linear range (approximately 1.27mm), corresponding to a -9VDC output from the preamplifier, to achieve the best linearity and stability.

Thread installation: Insert the 3/8-24 UNF full-length thread into the dedicated base, with the torque controlled at 1.1–1.4N・m. Do not force-tighten to avoid damaging the thread.

Cable laying: The 1-meter cable should have a bending radius of ≥3 times the cable diameter. Avoid sharp-angle bending; separate the cable from the power cable for routing, and protect it with a conduit to prevent mechanical damage. Keep it away from high-temperature heat sources.

Connection of connectors: The micro ClickLoc connector has a protective cap. Align and insert it into the slot, and it will lock when you hear a "click" sound. After installation, fasten the protective cap to prevent dust and moisture, and check the tightness regularly.

VII. Typical Application Scenarios

Power industry: Deep-hole measurement points for steam turbine generator sets, boiler feed pumps, induced draft fans, etc., for monitoring shaft vibration and axial displacement, and warning of bearing wear and rotor friction.

Petrochemical industry: Conventional non-explosion-proof factory centrifugal compressors, process pumps, mixing units, deep-hole or long-distance measurement points for vibration and displacement monitoring to ensure long-term stable operation of the equipment.

Metallurgical industry: High-temperature blast furnace fans, large transmission motors, rolling mill rotating mechanisms, deep-hole installation scenarios for monitoring vibration and displacement, to avoid risks of equipment overload damage.

General machinery: Key phase acquisition, speed measurement, eccentricity analysis for various large rotating machinery, suitable for long shells and special installation structures, providing data for dynamic balance correction and fault diagnosis.

TSI system complement: As the front-end component of the 3300 XL system, it is paired with the preamplifier and monitoring card to build a safety monitoring system for rotating machinery in conventional industrial areas.

IX. Product Advantages

Full-length threaded long shell: 0.0 inch without threaded section + 8.0 inches of long shell, suitable for deep-hole and long-distance installation, providing more stable fixation.

Strong standard compatibility: 1-meter non-armored cable, flexible for conventional distance wiring, with low overall usage cost.

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

Convenient maintenance: ClickLoc connector with a protective cap can be plugged and unplugged without tools, with strong component interchangeability, and no need for calibration during on-site replacement.

Industrial durability: Stainless steel housing + heat-resistant end, anti-vibration, anti-aging, supporting 7×24-hour continuous operation.