Product Overview
When process compressors and rotating machinery demand reliable vibration monitoring, the Bently Nevada 330904-00-06-05-01-00 delivers precision and durability. This 3300 NSv proximity probe, part of the 330900 series, is engineered for harsh industrial environments. With its M8X1 thread and armored construction, it provides accurate shaft displacement measurements critical for predictive maintenance.
The 330904-00-06-05-01-00 is mechanically and electrically compatible with the previous 3300 RAM probe, allowing seamless upgrades. Its enhanced chemical resistance makes it ideal for process compressor applications where aggressive media are present. The side-view characteristics outperform the older 190 probe, ensuring reliable gapping at the same target distance.
Technical Specifications
| Parameter |
Value |
| Model |
330904-00-06-05-01-00 |
| Thread Type |
M8X1 |
| Overall Case Length |
60 mm |
| Total Probe Length |
0.5 meter (20 in) |
| Connector |
Miniature coaxial ClickLoc with connector protector |
| Probe DC Resistance (0.5 m) |
4.0 ± 0.5 ohms |
| Linear Range |
1.5 mm (60 mils) |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) +12.5%/-20% |
| Deviation from Best Fit Straight Line |
Less than ±0.06 mm (±2.3 mils) |
| Frequency Response |
0 to 10 kHz: +0, -3 dB typical |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Probe Cable |
75 Ω coaxial, FEP insulated |
| 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) |
Performance & Reliability
The 330904-00-06-05-01-00 offers a linear range of 1.5 mm, starting at 0.25 mm from the target. This ensures accurate measurement from -1 to -13 Vdc, covering typical shaft vibration amplitudes. The incremental scale factor of 7.87 V/mm provides consistent output, with interchangeability error included.
Its frequency response of 0 to 10 kHz with only -3 dB rolloff ensures reliable signal capture even with up to 305 meters of field wiring. The probe's robust construction—PPS tip and 304 SST case—withstands harsh process conditions, reducing maintenance frequency and downtime.
Compared to older 3300 RAM probes, the NSv variant offers superior chemical resistance, making it a preferred choice for process compressors. This upgrade path lets plants modernize without changing existing extension cables or monitors.
Installation & Setup
Proper installation is key to optimal performance. Follow these steps:
- Mount the probe with the M8X1 thread into the mounting hole, ensuring maximum thread engagement of 12 mm.
- Tighten to finger tight, then apply a maximum torque of 0.56 N•m (5 in•lb). Do not overtighten.
- Maintain a minimum bend radius of 25.4 mm for the cable to prevent damage.
- Set the recommended gap to 1.0 mm (40 mils) from the target surface.
- Use field wiring of 0.2 to 1.5 mm² (16 to 24 AWG), preferably a three-conductor shielded triad cable, with a maximum length of 305 meters.
Maintenance & Longevity
Designed for long-term reliability, the 330904-00-06-05-01-00 requires minimal maintenance. Its stainless steel case and PPS tip resist corrosion and wear. Regular inspection of the cable and connector is recommended to ensure signal integrity. The probe's pressure sealing, using a Viton O-ring, maintains integrity in differential pressure environments, though units are not pressure tested before shipment.
By reducing unexpected failures and extending service intervals, this probe lowers total cost of ownership—a smart investment for continuous operations.
Selection Guide
When ordering the 330904-00-06-05-01-00, verify the following: unthreaded length (00 mm), overall case length (60 mm), total length (0.5 m), connector type (ClickLoc), and agency approval (not required). This configuration suits standard vibration monitoring applications.
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