Product Overview
The Bently Nevada 330903-00-05-70-01-05 is a 3300 NSv proximity probe designed for reliable vibration and position monitoring in critical rotating machinery. This Industrial Automation Module measures 7.0 meters (23.0 feet) in total length and features an M8x1 threaded case without armor, making it suitable for a wide range of process compressor and turbomachinery applications. As a direct mechanical and electrical replacement for the previous 3300 RAM probe, the 330903-00-05-70-01-05 offers enhanced chemical resistance, ensuring dependable performance even in harsh environments.
With its miniature coaxial ClickLoc connector and standard cable, this probe integrates seamlessly into existing Bently Nevada monitoring systems. The probe's side-view characteristics outperform the 3000-series 190 probe, providing accurate gap measurements at the same distance from the target. Choose the Bently Nevada 330903-00-05-70-01-05 for long-term reliability in your predictive maintenance program.
Technical Specifications
The following specifications are directly from the manufacturer's data for the Bently Nevada 330903-00-05-70-01-05:
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Linear Range: 1.5 mm (60 mils), beginning at approximately 0.25 mm (10 mils) from target, extending to 1.75 mm (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 Tip Material: Polyphenylene sulfide (PPS).
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Probe Case Material: AISI 304 stainless steel (SST).
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Probe Cable: 75 Ω coaxial, fluoroethylene propylene (FEP) insulated, available in lengths 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).
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Minimum Bend Radius: 25.4 mm (1.0 in).
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Probe DC Resistance (RPROBE): 5.9 ± 0.9 ohms (for 7.0 m probe length).
Installation & Setup Guidance
Proper installation is critical for accurate measurements. Follow these guidelines for the Bently Nevada 330903-00-05-70-01-05:
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Mounting: Use the M8x1 thread for secure mounting. Recommended torque is finger tight; maximum torque is 0.56 N•m (5 in•lb). Do not overtighten.
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Thread Engagement: Maximum thread engagement length is 12 mm for M8x1 cases.
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Bend Radius: Maintain a minimum bend radius of 25.4 mm (1.0 in) for the cable to prevent damage.
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Field Wiring: Use three-conductor shielded triad cable with conductor sizes 0.2 to 1.5 mm² (16 to 24 AWG). Maximum length between the 3300 XL NSv Proximitor Sensor and the monitor is 305 meters (1,000 feet).
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Gap Setting: Set the gap to 1.0 mm (40 mils) for optimal performance within the linear range.
Maintenance & Reliability
The Bently Nevada 330903-00-05-70-01-05 is built for durability, but routine inspection ensures long service life. Regularly check the probe cable for cuts or abrasions, especially at bend points. Verify that the mounting threads remain clean and free of debris. The probe's PPS tip and 304 SST case resist chemical attack, making it suitable for process compressor environments. Since the probe is not pressure tested before shipment, if your application requires a pressure seal test, contact the custom design department. With proper care, this probe provides consistent, accurate measurements, reducing downtime and maintenance costs.
Compatibility & Integration
The Bently Nevada 330903-00-05-70-01-05 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 standard Bently Nevada monitoring systems. The miniature coaxial ClickLoc connector ensures a secure, reliable connection. This probe is an ideal drop-in replacement for existing 3300-series installations, simplifying upgrades and spare parts management.
Selection Guide & Purchasing Advice
Before purchasing the Bently Nevada 330903-00-05-70-01-05, verify your system requirements: total probe length (7.0 m), thread type (M8x1), and connector type (miniature coaxial ClickLoc with connector protector). This model includes multiple agency approvals (option 05), ensuring broad acceptance. For reliable sourcing, PLC Source PRO offers this genuine, factory-packed unit with a 12-month warranty. Ensure compatibility with your existing monitor and extension cables to avoid unnecessary downtime.