EPRO PR9268/201-000 Axial Electrodynamic Vibration Velocity Sensor

The EPRO PR9268/201-000 is a high-performance electrodynamic velocity sensor belonging to the PR9268 series, adopting completely different working principles from conventional eddy current probes. As a dedicated axial absolute vibration monitoring sensor, it relies on electromagnetic induction to output voltage signals linearly proportional to mechanical vibration velocity, realizing direct and reliable casing vibration measurement. Designed with wide frequency response and large amplitude tolerance, it is ideal for detecting medium and high-frequency structural vibration of rotating machinery casings and bearing housings. Fully compatible with MMS6000 TSI system and supporting signal processing modules, it is widely deployed in thermal power, petrochemical and heavy industrial fields for long-term online condition monitoring of large turbines, compressors and auxiliary rotating equipment.

1. Electrodynamic Structural Design & Installation Advantages

PR9268/201-000 features an integrated rugged alloy housing with high-strength internal coil and spring-mass induction structure, built to withstand long-term industrial vibration, temperature impact and environmental erosion. The professional axial measurement layout ensures precise induction of vertical vibration displacement and velocity on equipment surfaces, avoiding measurement deviation caused by transverse vibration interference. With standardized industrial mounting structure, the sensor delivers excellent structural rigidity and operational stability under continuous unit running conditions.

Different from non-contact eddy current probes, this contact-type velocity sensor is fixed directly on equipment bearing housings and casings, achieving synchronous vibration follow-up measurement without precise gap adjustment. The compact integrated design simplifies on-site installation and commissioning, requiring no regular spacing calibration. It supports direct replacement of old PR9268 series electrodynamic sensors, with strong on-site adaptability and low system renovation cost for traditional casing vibration monitoring points.

2. Core Velocity Measurement Performance

Adopting mature electrodynamic induction principle, PR9268/201-000 outputs linear vibration velocity voltage signals with stable and consistent sensitivity. It supports a wide frequency response range of 4Hz–1000Hz, covering mainstream medium and high-frequency vibration characteristics of industrial rotating machinery, perfectly matching fault frequency identification for bearing wear, structural looseness and mechanical resonance. The sensor allows a maximum peak-to-peak vibration amplitude of 3mm, solving the measurement saturation problem of ordinary precision sensors under large vibration working conditions.

With a natural frequency of 4.5Hz±0.75Hz and ultra-low transverse sensitivity, it effectively suppresses invalid transverse vibration interference and improves effective vibration signal acquisition accuracy. The sensor features excellent temperature stability, adapting to long-term operation in complex industrial environments. It maintains stable linear output without zero drift or signal distortion under continuous load fluctuation and temperature change, supporting 24/7 uninterrupted absolute vibration monitoring of equipment casings.

3. Internal Circuit & Environmental Adaptability

Built with high-purity induction coil and precision damping structure, the sensor features stable internal impedance parameters and excellent signal linearity. The sealed industrial-grade structure achieves reliable dust-proof and moisture-proof performance, adapting to high-humidity, dusty and oil-mist industrial working conditions. It withstands 10g continuous vibration load and 20g short-term impact load, fully meeting the mechanical tolerance requirements of heavy-duty rotating equipment operation.

The working temperature range covers conventional industrial operating environments, with standardized storage and transportation tolerance of -40℃ to +85℃. Strictly manufactured in accordance with DIN 40040 and IEC68-2 industrial standards, it features strong environmental anti-interference ability and long service life, effectively reducing routine maintenance and replacement frequency of field monitoring sensors.

4. Supporting Signal Processing & System Matching

PR9268/201-000 requires dedicated vibration signal processing modules for signal filtering, amplification and data conversion, perfectly compatible with MMS6000 TSI system vibration monitoring cards. Its matching mode is exclusively optimized for electrodynamic velocity signals, differing from eddy current probe demodulation logic:

• Velocity Signal Acquisition Module: Specialized for analog velocity voltage signal collection, featuring built-in frequency band filtering to eliminate low-frequency clutter and high-frequency interference, restoring true equipment casing vibration characteristics.

• Field Signal Amplifier Module: Optimized for weak electrodynamic signal amplification, compensating on-site signal attenuation and improving anti-interference ability for long-distance field transmission.

• TSI System Vibration Monitoring Card: Matches sensor linear output characteristics, realizing real-time vibration velocity value calculation, threshold alarm and historical trend recording for equipment condition analysis.

5. Core Product Selling Points & Industrial Value

• Professional Axial Absolute Vibration Measurement: Directly monitors equipment casing vibration velocity, making up for the monitoring blind spot of shaft displacement probes and realizing comprehensive unit vibration condition evaluation.

• 4–1000Hz Ultra-wide Frequency Band: Covers full-frequency vibration fault characteristics of rotating machinery, supporting accurate diagnosis of bearing faults, structural resonance and mechanical looseness.

• 3mm Large Amplitude Tolerance: Adapts to large vibration swing of heavy-duty equipment, avoiding measurement saturation and data loss under abnormal operating conditions.

• Maintenance-free Fixed Installation: No gap adjustment required after installation, stable long-term operation, greatly reducing on-site debugging and daily maintenance workload.

• Industrial-grade Environmental Reliability: Compliant with international industrial standards, strong mechanical impact resistance and environmental adaptability, suitable for harsh industrial continuous monitoring scenarios.

6. Industrial Application Scenarios

• Casing absolute vibration monitoring of large thermal power steam turbines, gas turbines and auxiliary rotating equipment

• Structural vibration condition monitoring of petrochemical heavy-duty centrifugal compressors and process industrial rotating machinery

• Medium and high-frequency vibration fault monitoring and early warning for industrial heavy-load equipment bearing housings

• Upgrade and optimization of traditional casing vibration monitoring systems for large rotating units