Description
1. Product Overview
Bently Nevada 135613-02-00 is a high-precision piezoelectric vibration monitoring sensor manufactured by Bently Nevada. Designed for industrial high-speed rotating power equipment, it serves as the core front-end sensing component of machinery condition monitoring and protection systems. Based on mature piezoelectric sensing principles, the sensor accurately measures absolute casing vibration, vibration severity and vibration displacement of equipment housings. It is widely applicable to critical rotating machinery including turbine generator sets, gas turbines, centrifugal compressors, large fans and pump units, acting as an original standardized vibration acquisition unit for the 3500 System and Orbit series monitoring systems.
Adopting an integrated sealed industrial structure, this sensor incorporates a high-precision piezoelectric sensing chip, signal conditioning unit, anti-interference shielding assembly and standardized signal output loop. It directly converts physical mechanical vibration quantities linearly into standard 4-20mA analog signals to realize on-site acquisition, shaping and stable transmission of vibration signals. Compared with conventional vibration probes, it features a wide frequency response range, high measurement accuracy, low temperature drift coefficient, strong resistance to environmental interference and excellent long-term stability. Complying strictly with industrial machinery monitoring standards as well as power and petrochemical industry specifications, it has passed high-low temperature cycling, vibration shock, waterproof and dustproof, EMC and long-term aging tests. Capable of long-term operation under harsh working conditions in power stations, chemical plants, oil & gas sites and metallurgical plants, it is an essential original spare part for new vibration monitoring system configuration, legacy sensor replacement, technical upgrading of condition monitoring systems and predictive maintenance.
2. Functional Characteristics
2.1 High-precision Piezoelectric Sensing for Comprehensive Vibration Acquisition
Equipped with an industrial-grade piezoelectric ceramic sensing core, it captures high-frequency and low-frequency vibration signals of equipment casings in real time via the piezoelectric effect, and accurately measures absolute vibration velocity, amplitude and fluctuating operating conditions. The built-in dedicated signal conditioning circuit automatically corrects signal deviation and filters clutter interference. It delivers high measurement linearity and minimal steady-state error, enabling precise identification of minor vibration anomalies and early fault disturbances. It provides reliable data support for diagnosing latent faults such as rotor unbalance, bearing wear, loose bases and rotor-stator rubbing.
2.2 Wide Frequency Response for Full-condition Vibration Monitoring
It features an ultra-wide frequency response range that fully captures vibration characteristics across all frequency bands during startup, steady-state operation and load variation of industrial rotating equipment. It can detect low-frequency operating drift as well as high-frequency fault vibration signals, fully meeting vibration monitoring requirements for different power equipment including steam turbines, compressors and fans. It effectively avoids drawbacks of ordinary sensors such as narrow bandwidth, signal truncation and loss of characteristic information, ensuring complete, authentic and valid vibration data throughout the equipment service cycle.
2.3 Standard 4-20mA Analog Output with Superior System Compatibility
It natively outputs industry-standard 4-20mA DC analog signals and can directly connect to Bently 3500 series monitoring modules, PLCs, DCS control systems, online condition monitoring platforms and data acquisition devices without extra signal conversion equipment. The signal features stable transmission, excellent linearity and strong attenuation resistance, supporting long-distance stable transmission to adapt to long and complex wiring scenarios on industrial sites, and can be rapidly integrated into various industrial automatic monitoring systems.
2.4 Ultra-low Temperature Drift and High Stability for Harsh Working Conditions
The core sensing chip undergoes temperature compensation and aging screening to achieve an extremely low temperature drift coefficient. It maintains stable measurement accuracy under alternating high and low temperature environments and prevents data offset and measurement distortion caused by temperature variation. The whole unit resists vibration, shock and electromagnetic interference, tolerating long-term unit vibration, high temperature and humidity in equipment rooms, dust, oil contamination and strong electromagnetic disturbance. No zero drift or accuracy degradation occurs during long-term operation.
2.5 Integrated Sealed Structure for Long-term Maintenance-free Operation
Manufactured with fully enclosed integrated packaging technology, the unit is waterproof, dustproof, corrosion-resistant and moisture-proof. Its protection rating satisfies requirements for all-weather operation on industrial sites. There are no vulnerable moving parts internally, delivering outstanding mechanical stability, ultra-low failure rate and long maintenance cycle. Once installed and commissioned, it can operate stably for a long time without maintenance, greatly reducing on-site inspection and equipment O&M costs and meeting the demand for 7×24-hour uninterrupted continuous operation of industrial equipment.
2.6 Standardized Mounting Design for Convenient Replacement and Technical Retrofit
It adopts universally standardized industrial mounting structure and wiring definition for simple installation, firm fixation and convenient wiring. It can replace various piezoelectric vibration sensors of the same specification in situ without modifying mounting bases, field cables or system configuration logic. It is suitable for compatible transformation of new and old monitoring systems and upgrade replacement of legacy equipment, greatly shortening construction cycles and lowering technical transformation costs.
3. Technical Parameters
3.1 Core Adaptation Parameters
Product Model: 135613-02-00 Brand: Bently Nevada Product Type: Industrial High-precision Piezoelectric Casing Vibration Sensor Compatible Systems: Bently 3500 Condition Monitoring System, Industrial DCS/PLC Automation Systems, Online Equipment Condition Monitoring Platforms Applicable Equipment: Turbine generator sets, gas turbines, centrifugal compressors, axial flow fans, industrial pump units, high-speed rotating power equipment Core Functions: Acquisition of absolute vibration of equipment casing, vibration amplitude monitoring, vibration severity measurement, operating anomaly detection, standard analog signal output Application Scenarios: Vibration monitoring of power station units, condition sensing of petrochemical rotating equipment, industrial equipment fault early warning, replacement of legacy sensing systems, predictive condition maintenance of equipment
3.2 Measurement and Sensing Parameters
Sensing Principle: High-precision piezoelectric ceramic induction Measurement Range: ±1000μm full-range accurate measurement Measurement Accuracy: ≤±0.1% FS full-scale high precision Sensitivity: 50mV/g standard industrial sensitivity Frequency Response: 0.1Hz～500Hz ultra-wide frequency response covering full-condition vibration characteristics Signal Output: Standard 4-20mA DC analog output Response Performance: Fast transient response with no signal lag or waveform distortion
3.3 Electrical Operating Parameters
Power Supply: 24VDC standard industrial DC power supply Operating Current: Rated 10mA low-power operation Max Power Consumption: ≤15W, low heat generation, suitable for long-term continuous operation Signal Characteristics: Linear output, low noise, no signal attenuation Anti-interference Design: Built-in shielding and filtering unit to suppress industrial electromagnetic clutter and power frequency interference Electrical Stability: Slight power fluctuation does not affect measurement accuracy; stable operation without signal jumping
3.4 Structural and Physical Parameters
Structure Type: Integrated fully sealed reinforced structure Overall Weight: Approx. 100g, lightweight design, stress-free installation Mounting Method: Rigid base mounting, closely fitted to equipment casing for precise acquisition Protection Technology: Fully enclosed waterproof, dustproof and anti-corrosion packaging, suitable for severe industrial environments Mechanical Characteristics: Vibration-resistant, shock-resistant, free from mechanical fatigue damage with high structural stability
3.5 Environmental Operating Parameters
Operating Temperature: -40℃～+85℃, stable operation in ultra-wide temperature range Storage Temperature: -40℃～+85℃ Operating Humidity: 5%～95%RH (non-condensing) Environmental Resistance: Tolerates dust, oil contamination, moisture, temperature fluctuation, strong electromagnetic interference and equipment vibration shock Operation Mode: Supports 7×24-hour uninterrupted continuous online monitoring all year round
4. Hardware Configuration & Structural Advantages
4.1 Core Hardware Configuration
The 135613-02-00 sensor adopts Bently original industrial-grade sensing hardware architecture, mainly consisting of a high-precision piezoelectric ceramic sensing chip, low-noise signal conditioning circuit, temperature compensation unit, electromagnetic shielding module and standardized signal output loop. The core chip undergoes precise factory calibration, high-low temperature aging and precision screening to guarantee measurement accuracy and long-term stability from the source. The built-in dedicated filtering and shaping circuit automatically filters high-frequency clutter, power frequency interference and line noise on site, delivering pure, linear and stable vibration analog signals. The overall circuit adopts low-power design equipped with voltage stabilization protection units, which effectively resist power fluctuation and voltage surge and eliminate signal jumping and measurement drift. Its hardware reliability far exceeds ordinary industrial vibration sensors.
4.2 Structural Design Advantages
The whole unit features an integrated sealed structure without exposed precision components, preventing sensing failure and signal abnormality caused by intrusion of dust, moisture and oil. The lightweight reinforced body rigidly fits the equipment casing, maximally restoring the real vibration state of equipment and avoiding measurement errors induced by mounting stress and structural resonance. The standardized base mounting structure ensures accurate positioning and firm fixation, adapting to mounting points on casings of various power equipment. Unified standard industrial wiring definition ensures compatibility with mainstream industrial control systems and quick connection to monitoring modules and upper-level systems. The whole sensor adopts three-proof coating technology with anti-aging, anti-corrosion and anti-fatigue properties. No structural damage or accuracy degradation occurs during long-term operation, greatly reducing equipment failure rate and O&M costs and meeting requirements of long-term online monitoring of critical industrial equipment.
5. Working Principle
The Bently Nevada 135613-02-00 piezoelectric vibration sensor implements a fully closed-loop sensing mechanism: mechanical vibration acquisition → piezoelectric energy conversion → temperature compensation correction → signal filtering and shaping → linear standardized output, realizing real-time and precise casing vibration monitoring of industrial equipment.
Mechanical vibration generated during equipment operation is transmitted to the sensor housing. The internal high-precision piezoelectric chip generates piezoelectric charge under mechanical vibration stress. The charge signal has an accurate linear correlation with equipment vibration velocity and amplitude, completing the primary conversion from mechanical physical quantity to electrical signal. The weak raw electrical signal is sent to the built-in signal conditioning unit for amplification, filtering, noise reduction and waveform shaping. Meanwhile, the temperature compensation module corrects measurement deviation caused by high and low temperature environments to eliminate temperature drift error. The calibrated and optimized standard signal is finally converted into 4-20mA industry-standard analog signal for stable output and uploaded to monitoring modules, DCS, PLC and other upper-level systems in real time.
The upper-level systems calculate real-time vibration amplitude and vibration severity of equipment by collecting standardized current signals to realize real-time vibration monitoring, anomaly alarms, fault tracing and condition analysis. Potential hazards such as bearing faults, rotor abnormalities and loose bases can be identified in advance to fully guarantee safe and stable operation of high-speed rotating power equipment.
6. Application Scenarios
6.1 Vibration Monitoring of Large Power Equipment in Power Stations
Widely applied to casing vibration monitoring of steam turbine generator sets and gas turbine units in thermal power and combined-cycle power stations. As the core front-end sensing device, it collects full-condition vibration data of units in real time, providing accurate data support for steady-state operation, load regulation and startup/shutdown monitoring. It complies with safety protection and condition monitoring specifications for power industry equipment and prevents equipment damage and unplanned shutdown accidents caused by excessive vibration.
6.2 Condition Management of Critical Rotating Equipment in Petrochemical Industry
Suitable for critical rotating machinery such as centrifugal compressors, large induced draft fans, industrial turbines and high-speed pump units in petroleum, chemical and metallurgical industries. It monitors casing vibration status of equipment round the clock, giving early warning of latent faults including mechanical wear, rotor-stator rubbing, rotor unbalance and loose bases. It ensures continuous stable operation of chemical production lines and mitigates risks of production shutdown and safety incidents.
6.3 Supporting for Industrial Automatic Monitoring Systems
It can seamlessly connect to various industrial automatic control systems and online condition monitoring platforms. As the bottom sensing terminal, it complements the data dimension of equipment vibration monitoring, facilitating digital equipment monitoring, intelligent fault early warning and refined O&M management for factories, supporting the construction of unattended and intelligent management systems in modern industry.
6.4 Reserve of Core Sensing Spare Parts in the Industry
As an original high-precision vibration monitoring sensor from Bently, it is an essential maintenance spare part for power, petrochemical and metallurgical enterprises. It can rapidly handle on-site faults such as sensor failure, signal interruption, inaccurate measurement and data drift, eliminating major hidden dangers arising from equipment operation without monitoring and ensuring year-round continuous safe and stable operation of critical power equipment.
