Description
Product Description
Overview
The PR9266-12 from Emerson Epro is a precision electrodynamic vibration velocity sensor designed for measuring absolute vibration on critical machinery. Optimized for low-to-medium frequency oscillations, it provides reliable seismic monitoring of turbines, compressors, and large rotating equipment. Its self-generating design ensures robust signal output without requiring external excitation, offering seamless integration with control and safety systems.
Key Technical Specifications
| Parameter |
Specification |
| Measurement Type |
Absolute Vibration Velocity (Seismic) |
| Standard Measuring Range |
0.5 – 100 mm/s |
| Output Signal |
4–20 mA Current Loop |
| Linearity Accuracy |
±0.1% of full scale |
| Repeatability |
±0.05% |
| Nominal Power Supply |
24 V DC (for transmitter electronics) |
| Frequency Response |
10 Hz – 1,000 Hz |
| Operating Temperature |
-40°C to +85°C |
| Housing Material |
Corrosion-Resistant Stainless Steel |
| Ingress Protection |
IP65 Standard / IP67 Optional |
| Mounting |
Threaded, compact design for bearing housings and gearboxes |
| EMI Immunity |
High resistance to electromagnetic interference |
Core Advantages
-
Electrodynamic Sensing: High-sensitivity coil with permanent magnet assembly ensures stable low-frequency measurement, outperforming piezoelectric sensors in seismic applications.
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Direct System Interface: Integrated transmitter converts raw seismic data to a linear 4–20 mA output, eliminating the need for separate charge amplifiers.
-
Rugged Construction: Designed for harsh turbine, compressor, and hydro-generator environments. Resistant to shock, vibration, and EMI.
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Easy Installation: Compact and threaded housing enables rapid deployment and retrofitting on existing machinery.
Applications
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Steam turbines and gas compressors
-
Hydro-power generators
-
Industrial gearboxes and bearing housings
-
Critical rotating machinery requiring continuous vibration monitoring
FAQ
Q: Does the sensor require external power?
A: No. The electrodynamic sensor is self-generating. 24 V DC is only required for the integrated transmitter electronics.
Q: Can it be used in high-moisture environments?
A: Yes. Standard IP65 protection, with IP67 optional for more extreme conditions.
Q: How does it compare to piezoelectric velocity sensors?
A: Electrodynamic sensors like PR9266-12 provide better low-frequency stability and do not require signal conditioning for direct 4–20 mA output.
