Bentley 330101-00-50-10-02-00 Electromagnetic Induction Probe Detailed Description

I. Product Introduction

330101-00-50-10-02-00 is a 3300 XL 8mm standard non-armored electromagnetic induction probe of the Nevada branch of Baker Hughes. It is the front-end 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 5.0-inch medium-long housing, and a 1-meter standard cable structure. It is suitable for conventional depth installation holes and full-thread fixed measurement points. Based on the electromagnetic induction principle, it realizes non-contact high-precision detection and is 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. It has good structural rigidity, stable measurement, and strong anti-electromagnetic interference ability. It is suitable for conventional non-explosion-proof industrial areas in the power, petrochemical, metallurgy, and coal chemical industries.

II. Basic Information

This model belongs to the 330101 non-armored probe series, different from the 330102 armored series. It comes with a standard 3/8-24 UNF American fine-thread. Model code interpretation: 00 represents no exposed rod section, the overall structure is full-length threaded; 50 represents the total length of the housing 5.0 inches, a medium-long housing; 10 represents the cable length of the probe itself 1 meter; 02 represents the configuration of the miniature ClickLoc coaxial connector and standard non-armored cable; 00 represents no explosion-proof and special certification, it is a standard industrial configuration.

The probe housing is made of AISI 303/304 stainless steel, the sensing end is made of high-temperature resistant PPS material, and it adopts the patented TipLoc one-piece molding process. The end and the housing are closely combined, and it can withstand equipment vibration for a long time without loosening or falling off. The cable is a non-armored flexible structure, and the wiring is flexible. The miniature ClickLoc connector supports tool-free insertion and removal, and the disassembly and assembly are convenient. The product has passed CE and UL industrial safety and electromagnetic compatibility certifications, without explosion-proof qualifications, and can only be used in non-flammable and non-explosive environments. The probe body protection level is IP54, suitable for dry, less dust, and non-corrosive medium sites. The entire machine is compatible with the 3300 XL full series preamplifiers, extension cables, and 3300, 3500 series TSI monitoring cards. It can also be connected to mainstream PLC, DCS data acquisition equipment.

III. Electrical Parameters

Standard measurement sensitivity 7.87V/mm, corresponding to 200mV/mil in imperial units, full-scale linear error ≤ ±1%, sensitivity fluctuation in the full temperature range ≤ ±1.5%. Effective linear measurement range 2.0mm, effective working range 0.25mm to 2.3mm. System frequency response 0Hz to 10kHz, covering all conventional vibration frequency bands of rotating machinery. When used in conjunction with the preamplifier, the output is - 1VDC to - 17VDC standard direct current voltage signal.

This probe is equipped with 1-meter cable, the overall DC resistance of the entire machine is 7.59Ω, with a deviation of ±0.50Ω. The minimum diameter of the measured metal target surface is 8.9mm. For engineering applications, it is recommended that the shaft diameter be no less than 50.8mm to ensure stable measurement. The product has excellent anti-electromagnetic interference performance, capable of withstanding the electromagnetic influence of frequency converters, large-power motors, contactors, etc., and the signal transmission is without distortion. The total electrical length of the sensing link requires consistency with the calibration parameters of the preamplifier, and it is strictly prohibited to cut or connect the cables.

IV. Environmental and Mechanical Parameters

Environmental Parameters

Standard working temperature - 52℃ to + 177℃, short-term can withstand + 218℃ high temperature; Storage temperature: -52℃ to +260℃. Operating environment relative humidity: 5% to 95%. Prohibited condensation, water accumulation and strong corrosive gases in the environment. No explosion-proof certification. Installation and use are prohibited in flammable and explosive hazardous areas.

Mechanical parameters

Non-threaded segment length: 0 inches. Full-length threaded design. Uniform installation and fixation force; Total shell length: 5.0 inches. Medium-long shell has moderate rigidity, suitable for regular depth installation holes. Comes with 1-meter standard non-armored flexible cable. Resistant to oil and aging. On-site installation tightening torque controlled within 1.1N・m to 1.4N・m. Prevents thread slippage and shell deformation. Non-armored cable minimum bending radius no less than 3 times the cable outer diameter. Prohibited sharp-angle bending, dragging, and crushing. Avoid damage to the wire core.

VII. 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. The eddy currents reverse and change 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-long shell of full-length thread suitable for regular deep holes

The full-length thread combined with a 5.0-inch medium-long shell is suitable for regular depth installation holes and full-length thread locking measurement points. The stainless steel shell has strong vibration and deformation resistance, high installation coaxiality, and is not prone to offset over the long term. The fixation effect is stable and reliable.

3. Standard cable suitable for regular wiring

1-meter non-armored flexible cable, suitable for medium-distance connection scenarios between the probe and the preamplifier, extension cable, etc. The cable has good flexibility, and can be normally bent in narrow spaces. 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℃ to +177℃ wide temperature range, ensuring continuous and accurate measurement data under different working conditions.

5. Line self-check and rapid maintenance

Can be coordinated with the preamplifier to achieve line fault detection. Precisely identify faults such as broken wires, short circuits, cable damage, and poor contact at the connection point, and output fault signals to trigger alarms. The same specification probes, cables, and preamplifiers have strong interchangeability, and after on-site replacement of spare parts, no recalibration is required, effectively shortening maintenance downtime.

VI. 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. A closed eddy current forms 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. The preamplifier converts the physical quantity of the gap into a continuous DC voltage at a fixed ratio of 7.87V/mm. The larger the gap between the probe and the shaft, the closer the output voltage is to -17VDC; the smaller the gap, the closer the output voltage is to -1VDC. The upper-level monitoring system parses the voltage values and converts them into parameters such as shaft vibration amplitude, axial displacement, speed, phase, etc., enabling online monitoring and safety interlock protection of the equipment.

VII. Installation and laying specifications

When installing, rotate the probe slowly into the dedicated installation base to ensure that the probe end face is parallel to the surface of the measured shaft, avoiding measurement errors caused by inclination. Before installing in regular depth holes, remove debris from the hole to prevent thread jamming. It is recommended to set the initial installation gap at the midpoint of the linear range, corresponding to approximately -9VDC output from the preamplifier, to achieve the best linear measurement performance. Threaded fastening is strictly carried out at a standard torque of 1.1N・m to 1.4N・m. Forceful tightening is strictly prohibited. Cable laying should be separated from high-voltage cables and power cables for wiring, reducing electromagnetic interference. The entire process must comply with the minimum bending radius requirements. The micro ClickLoc connector is inserted into the slot and is considered connected when the locking sound is heard. Daily, dust protection for the connector should be ensured. The probe should not be soaked in oil or water for a long time. The cable should maintain the original factory length and should not be cut or spliced.

VIII. Typical Application Scenarios

In the power industry, it is mainly used for regular deep measurement points of auxiliary equipment such as steam turbine generators, boiler feed pumps, induced draft fans, and exhaust fans, to monitor shaft vibration and axial displacement, and to provide early warnings of faults such as bearing wear and rotor friction. In the petrochemical field, it is applicable to centrifugal compressors, gas turbines, process pumps, and mixing units in non-explosion-proof areas, for real-time monitoring of vibration and displacement, ensuring the long-term stable operation of the equipment.

In the metallurgical industry, it can be deployed in blast furnace fans, large transmission motors, and rolling machine rotating mechanisms, to monitor the operating status of equipment, avoiding safety hazards caused by abnormal vibration and equipment overload. It can also be used for various large-scale rotating machinery phase phase acquisition, speed measurement, and shaft eccentricity analysis, providing data support for dynamic balance correction, fault diagnosis, and condition-based maintenance. As a standard front-end component of the 3300 XL system, it can be combined with TSI monitoring cards to build a complete unit safety monitoring system.

IX. Product Advantages

The full-length thread is paired with a 5.0-inch medium-long housing, suitable for regular depth installation holes, providing firm and uniform fixation, and having strong versatility. The 1-meter standard non-armored cable wiring is flexible and has a low comprehensive usage cost. The measurement accuracy is high, the linearity is excellent, it operates stably in a wide temperature range, and fully meets the API 670 heavy industrial equipment monitoring standards. The standard thread and quick connector design ensure strong component interchangeability, making spare parts management and on-site maintenance simple. Industrial-grade materials are resistant to aging and vibration, supporting 7×24 continuous operation, with a long service life. It is compatible with the vast majority of conventional industrial sites and has a wide range of applications.