Product Overview
When process compressors demand reliable vibration monitoring, the Bently Nevada 330904-08-15-70-11-00 delivers precise proximity measurement. This 3300 NSv probe, part of the 330904 series, features an M8X1 threaded case with armor, an 80 mm unthreaded length, a 150 mm overall case length, and a 7.0-meter (23.0 feet) total length. Equipped with a miniature coaxial ClickLoc connector with connector protector and FluidLoc cable, this industrial automation module is engineered for harsh environments.
The 330904-08-15-70-11-00 is mechanically and electrically compatible with Bently Nevada's previous 3300 RAM probe, offering enhanced chemical resistance for demanding process applications. Its side-view characteristics outperform the 3000-series 190 probe when gapping at the same distance from the target.
Key Specifications
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Linear Range: 1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils) from target
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Recommended Gap Setting: 1.0 mm (40 mils)
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Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) +12.5%/-20%
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Deviation from Best Fit Straight Line (DSL): Less than ±0.06 mm (±2.3 mils)
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Frequency Response: 0 to 10 kHz: +0, -3 dB typical (with up to 305 m field wiring)
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Probe DC Resistance: 5.9 ± 0.9 ohms (for 7.0 m length)
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Operating Temperature: -52°C to +177°C (-62°F to +351°F)
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Probe Tip Material: Polyphenylene sulfide (PPS)
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Probe Case Material: AISI 304 stainless steel
Technical Specifications
| Parameter |
Value |
| Model |
330904 - 3300 NSv Probe, M8X1 thread, with armor |
| Unthreaded Length |
80 mm |
| Overall Case Length |
150 mm |
| Total Length |
7.0 meters (23.0 feet) |
| Connector & Cable Type |
Miniature coaxial ClickLoc connector with connector protector, FluidLoc cable |
| Agency Approval |
Not required |
| Extension Cable DC Resistance |
Center conductor: 0.220 Ω/m (0.067 Ω/ft); Shield: 0.066 Ω/m (0.020 Ω/ft) |
| Extension Cable Capacitance |
69.9 pF/m (21.3 pF/ft) typical |
| Field Wiring |
0.2 to 1.5 mm² (16 to 24 AWG); 0.25 to 0.75 mm² (18 to 23 AWG) with ferrules; max 305 m (1000 ft) between Proximitor and monitor |
| Probe Cable Specification |
75 Ω coaxial, FEP insulated; total lengths 0.5, 1, 5, or 7 meters |
| Maximum Torque |
0.56 N•m (5 in•lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) with or without SST armor |
| Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Pressure Sealing |
Viton O-ring; differential pressure design |
| Connector-to-Connector Torque (M8X1) |
Max 7.3 N•m (65 in•lb); Recommended 5.1 N•m (45 in•lb) |
| Maximum Thread Engagement |
12 mm for M8x1 |
Industry Applications
The Bently Nevada 330904-08-15-70-11-00 excels in process compressor monitoring where chemical resistance is critical. Its compatibility with previous 3300 RAM systems makes it an ideal drop-in replacement for existing installations, minimizing downtime during upgrades.
Typical applications include:
- Vibration monitoring on rotating machinery such as compressors, turbines, and pumps
- Axial position measurement on shafts (with target size considerations)
- Integration into Bently Nevada 3300 XL NSv Proximitor systems for complete condition monitoring
This probe's superior side-view characteristics ensure accurate readings even in tight installations, making it a reliable choice for retrofit projects.
Installation & Setup Guidance
Proper installation is essential for accurate measurements. Follow these guidelines:
- Recommended mounting torque is finger tight, with a maximum of 0.56 N•m (5 in•lb) to avoid damaging the probe.
- Use the recommended gap setting of 1.0 mm (40 mils) from the target surface.
- Ensure the target is flat and meets the minimum diameter of 8.9 mm (0.35 in); for recommended accuracy, use at least 13 mm (0.5 in).
- For field wiring, use a three-conductor shielded triad cable with cross-section 0.2 to 1.5 mm² (16 to 24 AWG). Maximum cable length between the Proximitor and monitor is 305 meters (1,000 feet).
- Respect the minimum bend radius of 25.4 mm (1.0 in) for the cable, with or without armor.
Maintenance & Reliability
The 330904-08-15-70-11-00 is built for longevity with a stainless steel case and PPS tip. To maintain reliability:
- Periodically inspect the probe tip and cable for damage or wear, especially in high-vibration environments.
- Check the connector torque periodically; the recommended connector-to-connector torque is 5.1 N•m (45 in•lb).
- Ensure the Viton O-ring seal remains intact to maintain differential pressure sealing.
- Monitor cable condition for abrasion or chemical exposure; the FEP insulation provides excellent chemical resistance.
With proper care, this probe offers extended service life, reducing total cost of ownership.
Compatibility & Integration
The Bently Nevada 330904-08-15-70-11-00 is designed to work seamlessly with Bently Nevada 3300 XL NSv Proximitor Sensors and monitors. It is mechanically and electrically interchangeable with the previous 3300 RAM probe and extension cable, allowing direct replacement in existing systems. The probe supports field wiring lengths up to 305 meters, offering flexibility in system layout.
Selection Guide & Purchasing Advice
Before purchasing, verify your system requirements:
- Confirm the total length needed (this model is 7.0 meters).
- Check the thread type (M8X1) and whether armor is required.
- Ensure the connector type (ClickLoc) matches your extension cable.
- For custom pressure testing, contact the manufacturer's custom design department.
At PLC Source PRO, we supply this industrial automation module in new, original factory packing with a 12-month warranty. Our team can assist with compatibility checks and expedite your order.