3300/15-02-01-01-01-02-01 Product Detailed SpecificationI. Product Overview

3300/15-02-01-01-01-02-01 is a high-precision dual-channel axial displacement monitoring module of the Bently 3300 series. It is specially designed for the condition monitoring of large industrial rotating machinery shaft systems and is the core hardware unit of the unit safety monitoring and interlock protection system. This model is a customized standard configuration version. Relying on the mature eddy current non-contact measurement principle, it focuses on monitoring the axial movement of the rotor, thrust gap, and position deviation of the shaft system of rotating equipment. The module adopts an industrial-grade modular architecture, featuring high measurement accuracy, excellent zero-point stability, no drift during long-term operation, and strong resistance to on-site interference. It can achieve 7×24-hour uninterrupted online monitoring. It can accurately capture the micro axial displacement changes, slow deviation hazards, and instantaneous faults of the unit， providing precise， continuous， and reliable on-site data for unit start-stop control， load adjustment， fault diagnosis， preventive maintenance， and safety interlock actions. It is widely used in high-risk continuous production scenarios such as power， chemical， and oil and gas industries.

II. Product Basic Attributes

This product belongs to the Bently classic 3300 industrial monitoring instrument series and is a dedicated dual-channel axial displacement monitoring module. It adopts an industry-standard cabinet rail-mounted installation structure. The overall volume is compact and the structure is stable. It is suitable for various industrial standard instrument cabinets and control cabinets， with neat wiring， convenient disassembly， maintenance， and replacement. The entire machine is designed and produced in strict accordance with international industrial electrical safety standards and electromagnetic compatibility standards. It can withstand strong electromagnetic interference in industrial sites， environmental temperature and humidity fluctuations， and equipment vibration. Before leaving the factory， it undergoes full-scale accuracy calibration， linearity verification， high and low temperature aging tests， and signal stability tests. The measurement linearity， repeatability， and stability of the entire machine reach the precision industrial instrument level. After installation on-site， no complex parameter setting is required. It can be simply configured and put into long-term stable operation.

The hardware interface， electrical protocol， and mechanical dimensions of this model are fully compatible with all products of the 3300 series. It can be freely combined and assembled with power module， vibration monitoring module， and communication expansion module of the same series. It supports system expansion， renovation of old equipment， module interchange and replacement， and has strong spare parts versatility. The long-term operation cost is low， and it is suitable for various scenarios of new unit construction and renovation projects. It can meet the strict requirements of industrial equipment for continuous operation throughout the year.

III. Core Functional Features

This module adopts a dual-channel independent monitoring design. The two monitoring channels operate independently and do not interfere with each other. It can simultaneously connect two sets of 3300 series eddy current displacement sensors to simultaneously collect and process the axial displacement signals of the rotor， achieving dual redundant monitoring， significantly improving the reliability of shaft system monitoring. The module is equipped with a high-performance signal processing circuit that can optimize processing of the original sensor signals from the site， including amplification， filtering and noise reduction， linear correction， analog-to-digital conversion， and other processes. It effectively filters electromagnetic noise and industrial frequency interference generated by surrounding equipment such as frequency converters， high-voltage motors， and power equipment， completely eliminating invalid signals， accurately restoring the true axial position state of the unit's rotor， ensuring stable， accurate， and distortion-free measurement data.

The equipment has a complete hierarchical alarm and fault self-check function. It supports customizing warning thresholds and danger thresholds according to the unit equipment parameters. It can accurately distinguish three operating states： normal operation， slight abnormality， and over-limit fault. When the axial displacement of the unit deviates， approaches the safety limit， or operates beyond the limit， the local status indicator light of the module updates in real time. At the same time， it continuously outputs standard analog signals and switch quantity alarm signals， seamlessly connecting with DCS， PLC， unit monitoring systems， and safety interlock systems to achieve real-time data upload， local status visualization prompt， and unit safety interlock linkage. It provides comprehensive protection for unit operation safety. At the same time, it can actively detect circuit faults such as sensor breakage, poor line contact, and abnormal signals, promptly feedback potential monitoring system failures, and avoid monitoring failures and data distortion.

IV. Equipment Performance Advantages

This module is compatible with industrial standard DC power supply systems, with working voltages suitable for the power supply environment of mainstream industrial instruments. The entire machine has low power consumption and small operating temperature rise, and there are no problems such as overheating, system freeze, performance attenuation, or zero-point drift during long-term continuous operation. The operational stability is extremely strong. The signal input circuit precisely matches the 3300 series eddy current displacement sensors, with high signal reception sensitivity, fast response speed, and excellent measurement linearity. It can accurately capture micrometer-level shaft displacement changes, fully meeting the precise monitoring requirements of large steam turbine units and compressor units. The equipment's dedicated range configuration is in line with the mainstream large-scale rotating machinery shaft displacement monitoring conditions, covering normal operation intervals, abnormal fluctuation intervals, and fault over-limit intervals, and is suitable for all operating scenarios such as steady-state operation, start-stop switching, and variable load operation.

The data refresh rate of the equipment is fast, enabling real-time synchronous feedback of shaft system dynamic changes. Data transmission has no delay or lag, and it accurately reflects the instantaneous operating state of the unit. The entire machine has been optimized with strict electromagnetic compatibility design, featuring outstanding anti-interference, anti-vibration, and temperature and humidity fluctuation resistance capabilities. It can operate stably and continuously in complex and harsh industrial environments. The equipment has excellent dust-proof, moisture-proof, and anti-aging performance, with an average fault-free operating time far exceeding that of ordinary industrial instruments, and is fully compatible with the year-round operation mode of industrial key equipment.

V. Compatible Adaptation System

This module needs to be combined with the original factory components of the 3300 series to build a complete monitoring circuit. Standard components include the same series eddy current axial displacement probes and dedicated extension cables. The impedance of the entire sensing circuit is precisely matched, and the signal transmission loss is extremely low, ensuring the maximum overall measurement accuracy and signal stability. On-site, industrial-specific shielded signal cables can be used to complete the stable transmission of analog data and alarm signals over long distances, and compatible standard cabinet rails, terminal blocks, etc., are available for general installation accessories. The installation standardization and compatibility are extremely strong.

The module can be freely integrated and assembled with the 3300 series' full range of power units, vibration monitoring units, and communication expansion units. It can be flexibly built into a centralized unit monitoring system based on the number of monitoring points and functional requirements at the site, supporting later point expansion, function upgrade, and system renovation. The market availability of all supporting accessories is large, and the procurement channels are wide, with strong universality and interchangeability, effectively reducing equipment spare parts reserves, daily operation and maintenance, and system upgrade and transformation costs.

VI. Applicable Industries and Application Scenarios

This module is widely used in high-end heavy industries such as thermal power generation, gas power generation, petrochemicals, coal chemical industry, oil and gas transportation, and metallurgical heavy industry. It is the core precision instrument for the safety protection of large key power units. It is mainly adapted to steam turbine generators, gas turbines, large centrifugal process compressors, reciprocating compressors, large axial flow fans, high-speed heavy industrial pump sets, etc., of various high-speed, heavy-load, and continuous-running rotating machinery. Especially suitable for core units with extremely high control requirements for rotor axial displacement, thrust bearing clearance, and shaft system operation stability.

The equipment is mainly deployed in steam turbine workshops, unit power workshops, chemical compressor workshops, oil and gas pressurization pump stations, metallurgical power stations, etc., suitable for all continuous production scenarios that require 24-hour online monitoring, configuration of safety interlock protection, implementation of condition-based maintenance and preventive maintenance, and can effectively predict and avoid major equipment accidents such as shaft deviation, rotor-stator friction, and thrust bearing burnout, ensuring the long-term safe, stable, and continuous operation of the entire unit and production system.