Bentley 330101-00-60-05-02-05 Electromagnetic Induction Probe Detailed Description

I. Product Introduction

330101-00-60-05-02-05 is a 3300 XL 8mm standard non-armored electromagnetic induction probe of Bently Nevada under Baker Hughes. It is the core sensing component of the rotating machinery TSI condition monitoring system. When used, it must be combined with the same series extension cable and preamplifier to form a complete measurement circuit. The product adopts full-length threads, a 6.0-inch medium-long housing, and a 0.5-meter short cable structure, suitable for medium-depth installation holes, full-length threaded fixed measurement points, and short-distance signal transmission scenarios. Based on the electromagnetic induction principle, it realizes non-contact high-precision detection, mainly used for radial shaft vibration, axial displacement, shaft eccentricity, key phase, and rotational speed monitoring of large rotating machinery. The product complies with API 670 industry standards, has strong structural rigidity and excellent anti-interference performance, and also has explosion-proof qualifications, suitable for flammable and explosive hazardous areas in industries such as petrochemicals, natural gas, power, and metallurgy.

II. Basic Information

This product belongs to the 330101 series standard non-armored probe and is used separately from the 330102 armored version. The standard industry 3/8-24 UNF metric fine-thread is included. Model code interpretation: 00 indicates no exposed rod section, the overall structure is full-length threaded; 60 indicates the total length of the housing is 6.0 inches, it is a medium-long housing; 05 indicates the probe's built-in cable length is 0.5 meters; 02 indicates the configuration of the miniature ClickLoc coaxial connector and standard non-armored cable; 05 indicates the installation with CSA, ATEX, IECEx explosion-proof certifications, which is a dedicated explosion-proof configuration.

The probe housing is made of AISI 303/304 stainless steel, the sensing end is made of high-temperature-resistant PPS material, and the patented TipLoc one-piece molding process is adopted. The end and the housing are closely combined, which can withstand the vibration of the equipment for a long time and is not prone to loosening and falling off. The cable is a non-armored flexible structure with a short cable design, and the wiring is simple. The miniature ClickLoc connector supports tool-free insertion and removal, and the disassembly and maintenance are convenient. The product passes CE, UL and multiple international explosion-proof certifications, the probe body's protection level is IP54, and it can adapt to dry, low dust, and non-corrosive hazardous conditions. The entire machine is fully compatible with the 3300 XL full series preamplifiers, extension cables, and 3300, 3500 series TSI monitoring cards, and can be connected to mainstream PLC, DCS data acquisition devices.

III. Electrical Parameters

The standard measurement sensitivity of the probe is 7.87V/mm, corresponding to 200mV/mil in the imperial system. The full-scale linear error is ≤±1%, and the sensitivity fluctuation in the full temperature range is ≤±1.5%. The effective linear measurement range is 2.0mm, and the standard effective working range is 0.25mm to 2.3mm. The system frequency response is 0Hz to 10kHz, which can cover the conventional vibration frequency band of rotating machinery. When working with the preamplifier, the output is -1VDC to -17VDC standard direct current voltage signal.

This probe is equipped with a 0.5-meter cable, and the standard value of the entire machine's DC resistance is 7.59Ω, with an allowable deviation of ±0.50Ω. The minimum diameter of the measured metal target surface is 8.9mm. In engineering applications, it is recommended that the measured shaft diameter be no less than 50.8mm to ensure the stability of the measurement data. The product's electromagnetic compatibility performance meets the standards, and it can effectively resist electromagnetic interference generated by frequency converters, large-power motors, etc., and the signal transmission is stable. The total electrical length of the sensing link of the entire system needs to be consistent with the calibration parameters of the preamplifier, and it is strictly prohibited to randomly cut or connect the cables.

IV. Environmental and Mechanical Parameters

Environmental Parameters Standard operating temperature range: -52°C to +177°C. Short-term can withstand +218°C high temperature; storage temperature range: -52°C to +260°C. Relative humidity of the operating environment: 5% to 95%. No condensation, water accumulation or strong corrosive gases are allowed in the environment. The product has complete explosion-proof certification and can be used normally in Zone 0/1/2 and other flammable and explosive hazardous areas.

Mechanical parameters

Length of non-threaded section: 0 inches. Full-length threaded design, uniform force during installation and fixation; total length of the housing: 6.0 inches. The medium-length housing is rigid enough and suitable for medium-depth installation holes. Comes with a 0.5-meter non-armored flexible cable, with oil-resistant and aging-resistant properties. On-site installation tightening torque is controlled within 1.1N·m to 1.4N·m to avoid excessive torque causing thread slippage or shell deformation. The minimum bending radius of the non-armored cable is no less than 3 times the outer diameter of the cable, and sharp-angle bending, dragging, and crushing are prohibited to prevent damage to the internal wires.

Five. Core functions

1. Non-contact precise detection

The probe coil receives the 0.5MHz to 2MHz high-frequency excitation signal output by the preamplifier, forming an alternating magnetic field. The magnetic field acts on the rotating metal shaft, and the metal surface induces eddy currents, which reverse the inductance and impedance of the coil. The probe transmits the electrical parameter changes to the preamplifier, converting them into linear voltage signals, accurately measuring the gap between the probe and the shaft, and simultaneously collecting static displacement and dynamic vibration data. There is no mechanical contact throughout the process, and zero wear.

2. Medium-length housing with full-length threads suitable for medium-depth holes

The full-length threads are paired with a 6.0-inch medium-length housing, specifically designed for medium-depth installation holes and full-length thread locking measurement points. The stainless steel housing has strong resistance to deformation and vibration, high installation coaxiality, and is unlikely to shift position over a long period of operation, ensuring stable and reliable fixation.

3. Short cable suitable for short-distance transmission

0.5-meter non-armored short cable, suitable for scenarios where the probe and preamplifier, as well as the extension cable, are relatively close. Reduces cable redundancy and interference from on-site wiring. The flexible material can be flexibly bent in a narrow space, and the original factory length ensures impedance matching. Do not cut privately.

4. Wide temperature operation and temperature compensation

Built-in high-temperature coils and insulating materials, combined with the system's automatic temperature compensation circuit, effectively suppresses temperature drift within the -52°C to +177°C wide temperature range, ensuring continuous and accurate measurement data under different working conditions.

5. Explosion-proof design suitable for hazardous areas

Has multiple international explosion-proof certifications, the sealing structure complies with explosion-proof specifications, and can be safely applied in petroleum, chemical, and natural gas production areas prone to flammable and explosive substances. While ensuring safety, it does not affect the measurement performance.

6. Self-detection of faults and rapid maintenance

Can be coordinated with the preamplifier to complete line fault detection, accurately identifying broken wires, short circuits, cable damage, and loose connections, and outputting fault signals to trigger alarms. The interchangeability of the same specification probes, cables, and preamplifiers is good. After on-site replacement of spare parts, no recalibration is required, shortening the maintenance downtime.

Six. Working principle

The coil inside the probe is supplied with high-frequency alternating current to generate a stable electromagnetic field. The magnetic field penetrates the air gap and acts on the measured metal shaft, forming a closed eddy current on the metal surface. The intensity of the eddy current changes with the gap between the probe and the shaft, thereby affecting the inductance, impedance, etc. of the coil. The probe transmits the changing signals to the preamplifier, which converts the physical quantity of the gap into a continuous DC voltage according to a 7.87V/mm ratio. The larger the gap, the closer the output voltage approaches -17VDC; the smaller the gap, the closer the output voltage approaches -1VDC. The upper-level monitoring system interprets the voltage values and converts them into parameters such as shaft vibration, axial displacement, speed, and phase, enabling online monitoring and safety protection of the equipment.

Seven. Installation and laying specifications During installation, slowly and evenly insert the probe into the dedicated base, ensuring that the end face of the probe is parallel to the surface of the measured shaft to avoid measurement errors caused by inclination. Before installing medium-depth holes, it is necessary to clean the debris inside the holes to prevent thread jamming. The initial installation gap is recommended to be set at the midpoint of the linear range, corresponding to a front-end device output of approximately -9VDC, to achieve the best linear performance.

The thread tightening must strictly follow the standard torque of 1.1N・m to 1.4N・m. Do not force-tighten. The cable laying should be separated from high-voltage and power cables to reduce electromagnetic interference. Strictly follow the minimum bending radius requirements. The micro ClickLoc connector is inserted into the slot and the clicking sound is heard as the connection is completed. Daily, take precautions to prevent dust from entering the connector.

When installing in explosion-proof areas, it is necessary to strictly follow the local explosion-proof construction specifications. The cable is treated with explosion-proof sealed connectors and must not damage the equipment's explosion-proof structure. The cable should maintain the original factory length and must not be cut or spliced. The probe must not be soaked in oil or water for a long time.

VII. Typical Application Scenarios

In the petrochemical and natural gas industries, it is mainly used for centrifugal compressors, gas turbines, process pumps, etc. in flammable and explosive hazardous areas to complete vibration and displacement monitoring of medium-depth measurement points, ensuring the safe and continuous operation of high-risk devices. It is suitable for medium-depth installation holes in power industry auxiliary equipment such as steam turbine generators, feed pumps, and induced draft fans, to monitor shaft vibration and axial displacement, and to issue early warnings for bearing wear, rotor friction, etc.

It can be used in the metallurgical industry for blast furnace fans, large transmission motors, and rotating mechanisms of rolling mills. It is used to monitor the operating status of equipment at medium-depth measurement points, avoiding risks caused by overload and abnormal vibration. At the same time, it can collect key phase information, measure rotational speed and shaft eccentricity, and provide data support for dynamic balance correction and fault diagnosis. As a standard front-end component of the 3300 XL system, it is combined with monitoring cards to build a safety monitoring system for rotating machinery in hazardous areas.

IX. Product Advantages

The full-length thread and 6.0-inch medium-long housing are suitable for medium-depth installation holes, providing stable and uniform fixation. The 0.5-meter short cable layout is simple and suitable for short-distance signal transmission, reducing wiring interference. It has formal explosion-proof qualifications and can be used in flammable and explosive hazardous areas, providing a wider application range. It has high measurement accuracy and excellent linearity, operates stably in a wide temperature range, and fully meets the API 670 industrial standard. The universal thread and quick-insert connector design allow for strong component interchangeability and simple on-site maintenance. Industrial-grade materials are resistant to aging and vibration, support 7×24-hour uninterrupted operation, and have a long service life.