Bentley 330101-00-12-10-02-00 Product Description

I. Product Overview

The Bentley 330101-00-12-10-02-00 belongs to the Bently Nevada 3300 XL series under Baker Hughes. It is an 8mm specification eddy current proximity probe that strictly follows the API 670 industry standard and is the core sensing element of the industrial rotating machinery condition monitoring system. The product adopts a non-contact measurement method and is mainly used for monitoring the radial vibration, axial displacement, shaft eccentricity, key phase, and speed signals of large rotating equipment. It is widely used in power, petrochemical, metallurgy, general manufacturing and other fields, providing continuous and precise detection data for online equipment condition monitoring, early fault warning, over-limit alarm and safety interlock protection.

II. Model Code Interpretation

330101 is the basic model of the product, representing the standard 8mm eddy current probe of the 3300 XL series, equipped with 3/8-24 UNF external thread, and the cable has no armored design. The second code 00 represents that the probe adopts the standard non-threaded installation length, suitable for conventional industrial installation bases. The third code 12 indicates that the total length of the probe housing is 1.2 inches, belonging to an ultra-short housing structure, which can be adapted to extremely narrow installation conditions. The fourth code 10 indicates that the built-in cable of the probe is 1.0 meters in length, with no armored cable, and the wiring is flexible and convenient. The fifth code 02 is the connector specification, equipped with a micro coaxial ClickLoc quick connector, which is quick to disassemble and has excellent vibration resistance performance. The last code 00 indicates that this product has not obtained explosion-proof related certification and can only be used in ordinary non-flammable and non-explosive industrial environments.

III. Working Principle

This product completes the detection work based on the eddy current effect. After the coil inside the probe is supplied with high-frequency alternating current, a stable alternating magnetic field is generated. When the probe approaches the metal measured rotating shaft, the metal surface will induce eddy currents, and the reverse magnetic field formed by the eddy currents will change the inductance and impedance values of the probe coil. The 3300 XL preamplifier that is matched can capture this electrical parameter change in real time and convert it into a standard negative voltage analog signal. The signal value is in a corresponding relationship with the gap between the probe and the shaft. The entire measurement scheme is a non-contact design, not affected by media such as water vapor, oil stains, and dust in the field, and can achieve long-term stable operation all day long.

IV. Core Technical Parameters

This product is equipped with a complete 3300 XL 8mm eddy current sensing system. The entire system is composed of the probe, extension cable, and preamplifier. The standard linear measurement range of the product is 2.0 mm, and the effective working range is 0.25 mm to 2.3 mm. The measurement sensitivity is 7.87V/mm, the overall accuracy error is controlled within ±5%, and the linearity is no more than ±0.025 mm. Within the linear working range, the output voltage range is - 1VDC to - 17VDC. The recommended static gap for on-site installation is 1.27 mm, corresponding to an output voltage of - 9VDC. The frequency response range of the system is 0 to 10kHz, which can meet the monitoring requirements of different speed units. At 25℃ ambient temperature, the overall resistance of the probe is 7.59Ω, with an allowable deviation of ±0.50Ω.

The rated working temperature range of the product is - 51℃ to + 177℃, capable of adapting to complex high-temperature and low-temperature industrial conditions. The probe housing is made of AISI 303/304 stainless steel material, with high mechanical strength and corrosion resistance; the tip of the probe uses polyphenylene sulfide material, with good high-temperature and insulation performance; The outer layer of the cable is made of FEP (fluorinated ethylene propylene) insulation, which is resistant to oil, aging, and has excellent flexibility. The overall protection level of the machine reaches IP65, effectively preventing dust and jet water. The product has CE and UL regular safety certifications, but no explosion-proof qualification. The probes, extension cables, and preamplifiers of the same series are fully interchangeable, and no separate pairing and calibration is required.

V. Mechanical Structure and Product Advantages

(1) Mechanical Structure

The probe adopts the industry-standard 3/8-24 UNF external thread design, which can be matched with most standard mounting bases. Combined with anti-loosening nuts, it can effectively prevent the probe from loosening and shifting due to vibration during equipment operation. The 1.2-inch ultra-short housing design significantly reduces the installation space requirements and is suitable for positions with narrow equipment cavities and limited installation depths. It comes with a 1-meter unarmored cable, with the minimum bending radius of the cable being no less than 5 times the diameter of the cable itself. The wiring is flexible in the field. The end of the cable is equipped with a ClickLoc micro coaxial quick connector, which is simple to plug in, has a tight and reliable connection, strong anti-vibration ability, and is convenient for daily maintenance and component replacement.

(2) Core Advantages

The product has high measurement accuracy, small temperature drift, strong data stability during long-term continuous operation, and can accurately capture the tiny vibrations and displacement changes of the rotating shaft. The internal integrated electromagnetic shielding structure can effectively resist electromagnetic interference from frequency converters and high-power motors, suitable for complex industrial electromagnetic environments. The combination of the ultra-short housing and the standard-length cable takes into account both installation compatibility and wiring flexibility, and is applicable to a wide range of scenarios. The series components are interchangeable, and the unified spare parts specifications can reduce inventory management and on-site maintenance costs. Non-contact measurement does not cause wear to the measured shaft, and with the IP65 protection level, the overall lifespan of the equipment is long, and the comprehensive reliability is outstanding.

VI. System Composition and Equipment Compatibility

This probe cannot work alone. A complete detection system must be used in combination with the same series extension cables and 3300 XL preamplifier. During use, it is necessary to strictly ensure that the total length of the probe's built-in cable and the extension cable is consistent with the calibration length of the preamplifier to avoid affecting measurement accuracy. The product is fully compatible with the BT 3300 series and 3500 series monitoring frames. The collected analog signals can be directly connected to mainstream industrial control systems such as DCS and PLC, and it supports static position measurement and dynamic vibration measurement, enabling real-time data display, over-limit alarm, and unit safety interlock functions.

VII. Typical Application Scenarios

In the power industry, it is mainly applied to steam turbines, gas turbines, power generation units, feedwater pumps, exhaust fans, and supply fans, etc., of main and large auxiliary equipment; in the petrochemical industry, it is suitable for centrifugal compressors, process pump sets, various conventional rotating power equipment, and can only be used in non-explosion-proof areas; in the metallurgical and general industrial fields, it can be matched with large drive motors, fans, gearboxes, and high-speed rotating units. The main monitored items include radial shaft vibration, axial displacement, and shaft eccentricity, and it can also be combined with the system to collect key signals to complete equipment speed monitoring.

VIII. Installation and Maintenance Specifications

During on-site installation, the static gap between the probe and the measured shaft should be adjusted to 1.27 millimeters, corresponding to an output voltage of -9VDC. The probe must not be in direct contact with the shaft to prevent friction and damage to the probe. After the thread installation is completed, the anti-loosening nut must be tightened to avoid probe displacement caused by vibration. The cable laying path should be away from high-voltage lines and large-power electrical equipment to reduce electromagnetic interference. The total cable length of the system must not be changed at will and must be consistent with the calibration parameters of the preamplifier.

During the daily operation stage, it is recommended to calibrate the equipment's accuracy once a year to ensure the accuracy of the detection data. When there are signal fluctuations, numerical anomalies, etc., the connection status of the joints and the condition of the cable appearance should be checked first. At the same time, verify whether the ambient temperature at the site exceeds the rated range. Regularly clean the oil stains and dust adhering to the tip of the probe to prevent foreign matter accumulation from interfering with normal measurement.

IX. Usage Precautions

The equipment should be used within the rated temperature range. Do not forcefully impact or bend the probe body to prevent damage to the internal coils. This model does not have explosion-proof certification. Installation and use are prohibited in flammable and explosive hazardous areas. To ensure measurement accuracy and equipment operation safety, it is recommended to use original components from the manufacturer. Mixing non-original accessories is highly likely to cause measurement errors and system failures. Avoid keeping the probe in strong corrosive media for a long time. In harsh working conditions with high corrosion and high dust, the frequency of equipment inspection should be appropriately increased.