Description
Product Description
Overview
The PR9268/x0x-100-RAD absolute vibration sensor is engineered for precise measurement of vibration velocities across a frequency range of 4–1000 Hz, supporting amplitudes up to 1500 mm peak-to-peak. This sensor delivers an electrical output directly proportional to vibration velocity, providing reliable, high-fidelity data for critical industrial applications.
Construction and Features
The sensor features a rugged, splash-proof housing suitable for harsh environments. Its measuring element consists of a seismic mass with an integrated coil, suspended on membrane springs, moving within a permanent magnet’s circular gap. The design ensures operation above the resonance frequency of 4.5 Hz. Vibration of the sensor housing generates an electrical signal proportional to the velocity, while damping cylinders achieve a damping factor of approximately 0.6, ensuring a linear response throughout the operational range.
Mechanical limit stops prevent overtravel during excessive vibration amplitudes. The PR9268/20x-100-RAD is optimized for vertical mounting, whereas the PR9268/30x-100-RAD is configured for horizontal installation.
Technical Specifications
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Frequency Range: 4–1000 Hz
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Maximum Vibration Amplitude: 1500 mm peak-to-peak
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Measuring Principle: Seismic mass with moving coil in permanent magnet
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Damping: 0.6 (linear characteristic across full range)
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Electrical Output: Proportional to vibration velocity
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Measuring Coil DC Resistance: 3750 Ω
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Channel Cleared Detection (with A6120): Additional 1500 Ω serial resistor reduces sensitivity to 28.5 mV/mm/s
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Resonance Frequency: 4.5 Hz
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Operational Temperature:
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Continuous: −10 to +80 °C (14–176 °F)
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Short-term (1 min): −10 to +105 °C (14–221 °F)
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Storage/Transport: −10 to +70 °C (14–158 °F)
Applications
Ideal for monitoring all types of turbomachinery including compressors, gearboxes, pumps, and mills. The high-output coil with low impedance provides excellent immunity to electrical interference, allowing direct connection to MM-S3000 and A6000 monitoring systems without intermediate amplifiers.
FAQ
Q: Can the sensor measure below the resonance frequency?
A: Yes, measurements below 4.5 Hz are possible with amplitude correction.
Q: What happens if vibration exceeds maximum amplitude?
A: Mechanical limit stops protect the measuring system, preventing damage.
Q: Are there different mounting orientations?
A: Yes, PR9268/20x-100-RAD is for vertical use, and PR9268/30x-100-RAD is for horizontal use.
Comparison with Similar Models
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PR9268/20x: Vertical orientation, identical frequency range and amplitude tolerance
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PR9268/30x: Horizontal orientation, suitable for shaft-aligned installations
