Product Introduction
The Bently Nevada 330904-08-10-10-11-05 is a 3300 NSv proximity probe engineered for reliable vibration and position monitoring in critical rotating machinery. This industrial automation module is part of the trusted 3300 series, offering enhanced chemical resistance compared to earlier RAM probes, making it ideal for process compressor applications. With a robust design and precise measurement capabilities, the 330904-08-10-10-11-05 ensures accurate data for predictive maintenance and machine protection.
Key Specifications
- Probe dc resistance: 4.2 ± 0.5 ohms (for 1.0 m length)
- Linear range: 1.5 mm (60 mils), from 0.25 to 1.75 mm
- Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil)
- Frequency response: 0 to 10 kHz (+0, -3 dB typical)
- Operating temperature: -52°C to +177°C (-62°F to +351°F)
- Probe tip material: Polyphenylene sulfide (PPS)
- Probe case material: AISI 304 stainless steel
Technical Specifications Breakdown
The 330904-08-10-10-11-05 delivers a linear range of 1.5 mm (60 mils), starting at approximately 0.25 mm (10 mils) from the target. This ensures precise gap measurements essential for shaft vibration monitoring. The Incremental Scale Factor of 7.87 V/mm (200 mV/mil) provides high sensitivity, allowing detection of minute displacements. With a deviation from best fit straight line of less than ±0.06 mm (±2.3 mils), you can trust the accuracy of this probe for critical protection systems.
The probe operates effectively across a wide temperature range from -52°C to +177°C, making it suitable for harsh industrial environments. Its PPS tip and stainless steel case offer excellent durability and chemical resistance, extending service life and reducing maintenance costs.
Industry Applications
Typical applications for the 330904-08-10-10-11-05 include:
- Vibration monitoring on centrifugal and reciprocating compressors
- Shaft radial and axial position measurement in turbines
- Thrust bearing wear detection in pumps and generators
In process compressor applications, the enhanced chemical resistance of the NSv probe outperforms older RAM models, ensuring reliable operation even in aggressive media. This probe is also mechanically and electrically interchangeable with previous 3300 RAM probes, simplifying upgrades.
Installation & Setup Guidance
Proper installation is crucial for accurate readings. Follow these guidelines:
- Mount the probe with the recommended torque of finger tight, up to a maximum of 0.56 N•m (5 in•lb).
- Maintain a minimum bend radius of 25.4 mm (1.0 in) for the cable to prevent damage.
- Ensure the target surface is flat and meets the recommended minimum diameter of 13 mm (0.5 in) for optimal performance.
- Set the initial gap to 1.0 mm (40 mils) as recommended.
- Use three-conductor shielded triad cable for field wiring; maximum length between the Proximitor Sensor and monitor is 305 meters (1000 feet).
Maintenance & Reliability
Routine inspection of the probe tip and cable is recommended to ensure long-term reliability. Check for any physical damage or contamination on the probe face. The Viton O-ring sealing design helps maintain differential pressure integrity, but probes are not pressure tested prior to shipment; if your application requires pressure testing, contact our custom design department.
Regularly verify the probe's dc resistance (4.2 ± 0.5 ohms for 1.0 m length) to detect any internal wiring issues. Keeping the probe and cable away from excessive heat or chemical exposure will prolong its service life and reduce downtime.
Selection Guide & Purchasing Advice
When selecting a replacement probe, verify that the part number 330904-08-10-10-11-05 matches your system's requirements, including thread size (M8X1), unthreaded length (80 mm), overall case length (100 mm), total length (1.0 meter), connector type (miniature coaxial ClickLoc with FluidLoc cable), and agency approval (multiple approvals). The 330904-08-10-10-11-05 is supplied new and in original factory packing with a 12-month warranty.
For reliable sourcing, PLC Source PRO offers genuine Bently Nevada components with fast shipping and expert support. Ensure you order the correct model to maintain system integrity.