Product Overview
When process compressor applications demand reliable vibration monitoring, the Bently Nevada 330904-08-10-50-01-00 delivers precision. This 3300 NSv Proximity Probe with armor is engineered for eddy-current measurement of shaft vibration and position. With a 5.0 meter total length and M8x1 thread, it integrates seamlessly into existing 3300 XL monitoring systems.
The 330904-08-10-50-01-00 offers increased chemical resistance over the older 3300 RAM probe, making it ideal for harsh environments. Its side-view characteristics outperform the 3000-series 190 probe, ensuring accurate gapping at the same distance from the target.
Technical Specifications
Key parameters define performance. The probe operates over a linear range of 1.5 mm (60 mils), starting at 0.25 mm from the target. Incremental Scale Factor (ISF) is 7.87 V/mm (200 mV/mil), with deviation from best fit straight line less than ±0.06 mm. Frequency response is 0 to 10 kHz (+0, -3 dB) with up to 305 meters of field wiring.
| Parameter |
Value |
| Probe dc Resistance |
5.3 ± 0.7 ohms (for 5.0 m length) |
| Extension cable dc resistance |
Center: 0.220 Ω/m; Shield: 0.066 Ω/m |
| Extension cable capacitance |
69.9 pF/m (21.3 pF/ft) typical |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Operating/Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Maximum Torque |
0.56 N•m (5 in•lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
Key Features & Benefits
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Interchangeable: Mechanically and electrically compatible with previous 3300 RAM probe and extension cable.
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Chemical Resistance: Increased resistance allows use in process compressor applications.
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Armored Cable: With SST armor for added protection in demanding environments.
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Precise Measurement: ISF of 7.87 V/mm ensures accurate vibration and position readings.
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Wide Temperature Range: Operates from -52°C to +177°C for extreme conditions.
Industry Applications
The 330904-08-10-50-01-00 excels in turbomachinery monitoring, including compressors, turbines, and pumps. Its chemical resistance makes it suitable for process compressors where aggressive media may be present. Use it for radial vibration and axial position measurements on rotating shafts.
In a typical setup, the probe is mounted in a bearing housing, targeting a shaft. The linear range of 1.5 mm provides ample coverage for most machinery. The armored design ensures longevity even in high-vibration environments.
Installation & Setup Guidance
Mount the probe with the recommended torque of finger tight (max 0.56 N•m). Ensure the target surface is clean and free of runout. Set the initial gap to 1.0 mm (40 mils) for optimal operation. Use three-conductor shielded triad cable for field wiring, with a maximum length of 305 meters between the Proximitor Sensor and monitor.
For small shafts (less than 13 mm diameter), expect a scale factor change; adjust the gap to minimize this effect. Verify the probe tip is parallel to the target surface to avoid side-view errors.
Maintenance & Reliability
Regularly inspect the probe cable for wear, especially at bend points where the minimum bend radius is 25.4 mm. Check the probe tip for contamination or damage. The Viton O-ring seals differential pressure, but the probe is not pressure-tested before shipment; if your application requires a pressure seal test, contact the custom design department.
Environmental factors such as temperature extremes are handled within the -52°C to +177°C range. With proper installation and care, this probe offers long-term reliability, reducing downtime.
Selection Guide & Purchasing Advice
Before purchasing, verify the probe length and connector type match your system requirements. The 330904-08-10-50-01-00 includes a miniature coaxial ClickLoc connector with protector and standard cable. Confirm compatibility with your existing 3300 XL NSv Proximitor Sensor.
For genuine Bently Nevada parts, PLC Source PRO offers new & original units in factory packing with a 12-month warranty. Ensure you have the correct extension cable and mounting hardware for your application.