Product Overview
When machine vibration threatens uptime, the Bently Nevada 330903-00-04-05-01-05 3300 NSv Proximity Probe delivers precise, reliable shaft displacement measurement. This industrial automation module is a direct replacement for legacy 3300 RAM probes, offering enhanced chemical resistance for demanding process compressor applications.
The 330903-00-04-05-01-05 features an M8x1 thread, a 0.5-meter (20-inch) total length, and a miniature coaxial ClickLoc connector with connector protector. Its side-view characteristics outperform earlier 3000-series 190 probes, providing superior gap measurement accuracy.
Technical Specifications
Every parameter below is factory-verified for the Bently Nevada 330903-00-04-05-01-05:
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Linear Range: 1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils), approximately -1 to -13 Vdc.
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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% including interchangeability error.
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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 meters (1000 feet) of field wiring.
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Probe DC Resistance: 4.0 ± 0.5 ohms (0.5 m length)
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Probe Tip Material: Polyphenylene sulfide (PPS)
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Probe Case Material: AISI 304 stainless steel
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Probe Cable: 75 Ω coaxial, FEP insulated, available in 0.5, 1, 5, or 7 meters.
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Operating / Storage Temperature: -52°C to +177°C (-62°F to +351°F)
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Maximum Torque: 0.56 N•m (5 in•lb), recommended finger tight.
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Minimum Bend Radius: 25.4 mm (1.0 in)
These specifications ensure reliable performance in harsh industrial environments, with a wide temperature range and robust construction.
Applications
The Bently Nevada 330903-00-04-05-01-05 is engineered for non-contact vibration and position monitoring on rotating machinery. Typical applications include:
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Process Compressors: The increased chemical resistance of the NSv probe allows safe operation in aggressive media, reducing probe degradation and maintenance intervals.
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Turbines and Generators: Accurate shaft vibration and axial position monitoring help prevent catastrophic failures and optimize maintenance schedules.
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Pumps and Fans: Reliable gap measurement ensures stable operation even in high-vibration environments.
With its superior side-view characteristics, this probe is ideal for applications where traditional probes struggle with target proximity.
Installation & Setup
Proper installation is critical for accurate readings. Follow these guidelines for the 330903-00-04-05-01-05:
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Torque: Tighten the probe finger tight, then apply up to 0.56 N•m (5 in•lb) maximum. Over-tightening can damage the threads or alter calibration.
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Thread Engagement: For M8x1 probe cases, ensure maximum thread engagement of 12 mm to maintain structural integrity.
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Bend Radius: Avoid bending the probe cable tighter than 25.4 mm (1.0 in) to prevent internal damage.
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Field Wiring: Use a three-conductor shielded triad cable with 0.2 to 1.5 mm² (16 to 24 AWG) conductors. Maximum wiring length between the Proximitor Sensor and monitor is 305 meters (1000 feet).
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Gap Setting: Set the initial gap to 1.0 mm (40 mils) for optimal linearity.
Always refer to the installation manual for detailed mechanical mounting instructions.
Maintenance & Reliability
The 330903-00-04-05-01-05 is designed for long service life, but routine checks can prevent unexpected failures:
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Inspection: Periodically inspect the probe tip for contamination or damage. Clean with a soft, dry cloth if necessary.
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Cable Integrity: Check the cable for cuts, abrasions, or excessive bending. Replace if damaged.
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Connector: Ensure the ClickLoc connector is securely seated and free of corrosion.
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Environmental: Operate within the -52°C to +177°C range; avoid exposure to chemicals that may attack the PPS tip or Viton O-ring.
Proactive maintenance minimizes downtime and extends probe life, delivering long-term cost savings.
Compatibility
The 330903-00-04-05-01-05 is mechanically and electrically compatible with Bently Nevada's previous 3300 RAM proximity probe and extension cable. It works seamlessly with 3300 XL NSv Proximitor Sensors and existing monitoring systems. This interchangeability simplifies upgrades without redesigning your monitoring architecture.
Selection Guide
Before ordering, verify your requirements: thread size (M8x1), unthreaded length (00 mm), overall case length (40 mm), total length (0.5 m), connector type (ClickLoc), and agency approvals (Multiple). The 330903-00-04-05-01-05 is a new, original unit in factory packing with a 12-month warranty. For bulk or custom configurations, contact PLC Source PRO to ensure you receive the exact probe for your application.