Product Overview
The Bently Nevada 330904-08-10-50-11-00 is a 3300 NSv proximity probe designed for reliable vibration and position monitoring in industrial rotating machinery. This model features an M8x1 threaded case, 80 mm unthreaded length, 100 mm overall case length, and a 5.0-meter total length with a miniature coaxial ClickLoc connector and FluidLoc cable. It is built to withstand harsh process environments, offering enhanced chemical resistance compared to earlier 3300 RAM probes.
As part of the 3300 NSv series, the 330904-08-10-50-11-00 delivers precise gap measurements with a linear range of 1.5 mm (60 mils) and an incremental scale factor of 7.87 V/mm (200 mV/mil). Its side-view characteristics are superior to those of the 3000-series 190 probe when gapping at the same distance, making it an excellent choice for compressor and turbine monitoring.
Technical Specifications
The following specifications are directly from the product datasheet for the 330904-08-10-50-11-00:
-
Probe DC Resistance: 5.3 ± 0.7 ohms (for 5.0 m probe length)
-
Linear Range: 1.5 mm (60 mils), starting at approximately 0.25 mm (10 mils) from target
-
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 (DSL): Less than ±0.06 mm (±2.3 mils)
-
Frequency Response: 0 to 10 kHz: +0, -3 dB typical
-
Target Size (flat target): Minimum 8.9 mm diameter; recommended minimum 13 mm diameter
-
Probe Tip Material: Polyphenylene sulfide (PPS)
-
Probe Case Material: AISI 304 stainless steel
-
Probe Cable: 75 Ω coaxial, FEP insulated, available in 0.5, 1, 5, or 7 meters
-
Maximum Torque: 0.56 N•m (5 in•lb); recommended finger tight
-
Minimum Bend Radius: 25.4 mm (1.0 in)
-
Operating/Storage Temperature: -52°C to +177°C (-62°F to +351°F)
-
Probe Case Torque (M8x1): Maximum 7.3 N•m (65 in•lb), recommended 5.1 N•m (45 in•lb)
Applications
The 330904-08-10-50-11-00 excels in process compressor applications where chemical resistance is critical. Its compatibility with previous 3300 RAM probes allows straightforward upgrades in existing Bently Nevada monitoring systems.
-
Process Compressors: Enhanced chemical resistance ensures reliable operation in aggressive media.
-
Turbomachinery: Accurate shaft vibration and axial position monitoring for turbines.
-
Pumps and Motors: Detect shaft displacement and vibration to prevent catastrophic failure.
Installation & Setup Guidance
Proper installation is key to achieving accurate measurements. Follow these guidelines:
-
Torque: Tighten the probe case to the recommended 5.1 N•m (45 in•lb) for M8x1 threads. Do not exceed the maximum rated torque of 7.3 N•m (65 in•lb).
-
Gap Setting: Set the initial gap to 1.0 mm (40 mils) to operate within the linear range.
-
Field Wiring: Use three-conductor shielded triad cable with 0.2 to 1.5 mm² (16 to 24 AWG) conductors. Maximum length between the Proximitor sensor and monitor is 305 meters (1,000 feet).
-
Bend Radius: Maintain a minimum bend radius of 25.4 mm (1.0 in) for the probe cable to avoid damage.
Maintenance & Reliability
The 330904-08-10-50-11-00 is designed for long service life, but regular inspection ensures optimal performance:
-
Inspect Probe Tip: Check for wear or contamination on the PPS tip that could affect readings.
-
Check Cable Integrity: Look for cuts or abrasions, especially near the connector and bend points.
-
Verify Torque: Periodically confirm that the probe case is still tightened to the recommended torque.
-
Environmental Considerations: The probe operates from -52°C to +177°C, making it suitable for extreme conditions.
Selection Guide & Purchasing Advice
When ordering the 330904-08-10-50-11-00, verify the following options to ensure it matches your system: unthreaded length (-08 = 80 mm), overall case length (-10 = 100 mm), total length (50 = 5.0 meters), connector type (11 = miniature coaxial ClickLoc with FluidLoc cable), and agency approval (00 = not required).
PLC Source PRO supplies this Bently Nevada 330904-08-10-50-11-00 as a new, original factory-packed unit with a 12-month warranty. Ensure compatibility with your existing 3300 XL NSv Proximitor sensor and monitor before purchase.