Bently 330101-00-25-10-02-00 Product Description

I. Product Overview

The Bently 330101-00-25-10-02-00 is a 8mm electro-vortex proximity probe of the 3300 XL series from Bently Nevada under Baker Hughes, in compliance with API 670 standards. It is the core sensing component for condition monitoring of rotating machinery. It adopts a non-contact electro-vortex measurement principle and is specifically used for monitoring radial vibration, axial displacement, shaft eccentricity, phase alignment, and rotational speed signals of large industrial rotating equipment. It is widely applied in power, petrochemical, metallurgy, gas, and other industries, providing precise and stable raw data for online equipment monitoring, fault early warning, over-limit alarm, and safety interlock.

II. Model Code Interpretation (330101-00-25-10-02-00)

330101: Basic model, 3300 XL series 8mm standard electro-vortex probe, 3/8-24 UNF external thread, without armor.

00: Standard non-threaded installation length, suitable for conventional installation bases.

25: Total length of the probe housing 2.5 inches (approximately 63.5mm), short housing design suitable for narrow spaces.

10: Built-in integral cable length 1.0 meter, without armor structure, flexible wiring.

02: Connector type, micro coaxial ClickLoc quick connector, resistant to vibration, easy to disassemble.

00: Certification level, no explosion-proof certification, only applicable to conventional non-flammable and non-explosive industrial environments.

III. Working Principle

Based on the electro-vortex effect. The coil inside the probe is supplied with high-frequency alternating current, generating a stable alternating magnetic field; when the probe approaches the metal measured shaft, the metal surface induces electro-vortex, whose reverse magnetic field changes the inductance and impedance of the probe coil. The 3300 XL preamplifier (Proximitor) captures this parameter change, linearly converting it into a standard negative voltage analog signal, the signal size being proportional to the gap between the probe and the shaft. Non-contact measurement is not affected by oil stains, moisture, and dust, and can operate continuously and stably for a long time.

IV. Core Technical Parameters

(1) Measurement Performance

Applicable system: 3300 XL 8mm electro-vortex sensing system (probe + extension cable + preamplifier).

Linear range: 2.0mm (80mil), effective working range 0.25–2.3mm (10–90mil).

Sensitivity: 7.87V/mm (200mV/mil), tolerance ±5%.

Linearity: ≤±0.025mm (±1mil).

Output voltage: linear range - 1VDC to - 17VDC; standard installation gap 1.27mm (50mil), corresponding output - 9VDC.

Frequency response: 0–10kHz, covering the monitoring requirements of high and low-speed rotating machinery.

Probe resistance (25℃): 7.59Ω ± 0.50Ω (1m cable).

(2) Environmental and Physical Characteristics

Operating temperature: -51℃ to + 177℃ (-60°F to + 350°F), suitable for high and low temperature conditions.

Shell material: AISI 303/304 stainless steel, corrosion-resistant, high mechanical strength.

Probe tip: PPS (polyphenylene sulfide), resistant to high temperature, good insulation.

Cable insulation: FEP (fluoroethylene propylene), resistant to oil, aging, good flexibility.

Protection level: IP65, dustproof, water-resistant, suitable for harsh industrial environments.

Certification: CE, UL regular safety certification; no explosion-proof qualification.

Interchangeability: Probe, extension cable, preamplifier are completely interchangeable, no need for separate pairing and calibration.

V. Mechanical Structure and Core Advantages (1) Mechanical Structure

Thread Specification: 3/8 - 24 UNF standard external thread, compatible with industry-standard mounting base, equipped with anti-loosening nuts to prevent vibration-induced displacement.

Shell Design: 2.5-inch short shell, suitable for equipment installation positions with limited space.

Cable Configuration: 1.0-meter unarmored integral cable, minimum bending radius ≥ 5 times the cable diameter, flexible wiring.

Connector Design: Micro coaxial ClickLoc quick connector, quick insertion, vibration-resistant, stable connection, facilitating on-site disassembly, maintenance and repair.

(2) Core Advantages

High Precision and Stability: Nanometer-level resolution, small temperature drift, stable long-term operation data, accurately capturing micro vibrations and displacements of the shaft.

Strong Anti-interference Capability: Built-in electromagnetic shielding structure, resistant to EMI/RFI interference, suitable for strong electromagnetic interference working conditions such as frequency converters and high-power motors.

Low Maintenance Cost: Components are interchangeable, unified spare parts, reducing inventory and on-site maintenance difficulty.

Long Service Life: Non-contact measurement without shaft wear, IP65 protection suitable for harsh environments, high comprehensive reliability.

Six. System Composition and Compatibility

It cannot be used alone. A complete measurement system requires the following components to be matched:

This probe (330101-00-25-10-02-00);

3300 XL series extension cable;

3300 XL preamplifier (Proximitor).

Key Requirements: The total length of the probe with the extension cable must strictly match the calibration length of the preamplifier to ensure measurement accuracy.

Compatible with the Bentley 3300, 3500 series monitoring framework, the output signal can be directly connected to the DCS/PLC system, supporting static (position) and dynamic (vibration) measurements, achieving real-time display, over-limit alarm and safety interlock.

Seven. Typical Application Scenarios

Power Industry: Steam turbines, gas turbines, power generation units, feed pumps, exhaust fans, supply fans, etc. main equipment and large auxiliary equipment.

Petrochemical Industry: Centrifugal compressors, process pump sets, high-speed rotating power equipment.

Metallurgy and General Industry: Large drive motors, fans, gearboxes, high-speed rotating equipment.

Monitoring Parameters: Radial vibration of the shaft, axial displacement, shaft eccentricity, key signal, speed.

Eight. Installation and Maintenance Specifications

(1) Installation Key Points

Gap Setting: Set the static gap to 1.27mm, corresponding to an output of - 9VDC;严禁 the probe to come into contact with the shaft to prevent damage.

Fixation and Anti-loosening： After the thread installation is in place， tighten the anti-loosening nut to avoid displacement caused by vibration.

Cable Installation： Keep away from high-voltage cables and large-power electrical equipment to reduce electromagnetic interference； minimum bending radius ≥ 5 times the cable diameter.

System Length： The total cable length (probe + extension) must be consistent with the calibration parameters of the preamplifier and must not be changed arbitrarily.

(2) Daily Maintenance

Calibration Cycle： It is recommended to calibrate once a year to ensure measurement accuracy.

Fault Troubleshooting： When there is abnormal signal， prioritize checking the connection of the connector， cable damage and whether the environmental temperature exceeds the limit.

Cleaning and Maintenance： Regularly clean the oil stains and dust at the tip of the probe to avoid foreign objects affecting measurement.

Nine. Usage Precautions

Temperature Limitation： Use strictly within the range of - 51℃ to + 177℃. Do not forcefully impact or bend the probe body to prevent damage to the internal coil.

Explosion-proof Prohibition： This model has no explosion-proof certification. It is strictly prohibited to install and use in flammable and explosive hazardous areas.

Component Requirements： It is recommended to use the original Bentley components. Mixing non-original components may lead to measurement inaccuracy or system failure.

Corrosion Protection： Avoid long-term immersion in strong corrosive media. In high-corrosion and high-dust working conditions， increase inspection frequency.