Product Overview
When precise shaft vibration and position monitoring are critical for rotating machinery, the Bently Nevada 330905-05-13-05-01-00 delivers reliable, accurate data. This 3300 NSv proximity probe is designed for permanent installation in process compressors, turbines, and other industrial equipment where chemical resistance and side-view performance matter. The 330905-05-13-05-01-00 is mechanically and electrically interchangeable with previous 3300 RAM probes, making it a straightforward upgrade path for existing systems.
Technical Specifications
The 330905-05-13-05-01-00 offers a linear range of 1.5 mm (60 mils), starting at approximately 0.25 mm (10 mils) from the target. This provides a usable measurement window from 0.25 to 1.75 mm (10 to 70 mils), corresponding to roughly -1 to -13 Vdc output. The recommended gap setting is 1.0 mm (40 mils), ensuring optimal operation within the linear zone.
Key performance parameters include:
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Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) with +12.5%/-20% 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 with +0, -3 dB typical, even with up to 305 meters (1000 feet) of field wiring.
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Probe dc Resistance: 4.0 ± 0.5 ohms for the 0.5-meter probe length.
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Extension Cable: Center conductor resistance 0.220 Ω/m (0.067 Ω/ft), shield resistance 0.066 Ω/m (0.020 Ω/ft), capacitance 69.9 pF/m (21.3 pF/ft) typical.
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Field Wiring: 0.2 to 1.5 mm² (16 to 24 AWG), with 0.25 to 0.75 mm² (18 to 23 AWG) when using ferrules. A three-conductor shielded triad cable is recommended.
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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, FEP insulated, available in 0.5, 1, 5, or 7 meters total length.
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Operating/Storage Temperature: -52°C to +177°C (-62°F to +351°F).
Applications
The 330905-05-13-05-01-00 excels in environments where chemical resistance is essential. Its increased chemical resistance compared to the 3300 RAM probe makes it suitable for many process compressor applications. The superior side-view characteristics also allow accurate gapping at the same distance from the target as the 3000-series 190 probe, but with better performance.
Typical applications include:
- Vibration monitoring on centrifugal and reciprocating compressors
- Axial shaft position monitoring in turbines and generators
- Eccentricity and differential expansion measurements in large rotating machinery
When replacing older 3300 RAM probes, the 330905-05-13-05-01-00 provides a drop-in solution with improved chemical resistance, reducing downtime and maintenance costs.
Installation and Setup
Proper installation is critical for accurate measurements. Follow these guidelines:
- Mount the probe with the recommended torque of finger tight, and do not exceed 0.56 N•m (5 in•lb) maximum torque.
- For M10X1 probe cases, the first three threads have a maximum rated torque of 22.6 N•m (200 in•lb) and a recommended torque of 7.5 N•m (66 in•lb).
- Ensure the probe tip is gapped at 1.0 mm (40 mils) from the target surface.
- Maintain a minimum bend radius of 25.4 mm (1.0 in) for the probe cable, with or without SST armor.
- Use the specified field wiring (0.2 to 1.5 mm² or 16 to 24 AWG) and keep the cable length between the Proximitor Sensor and monitor within 305 meters (1000 feet).
Maintenance and Reliability
The 330905-05-13-05-01-00 is built for long-term reliability in harsh industrial environments. Its PPS probe tip and AISI 304 SST case resist chemical attack and mechanical wear. The Viton O-ring seals the probe against differential pressure between the tip and case, but note that probes are not pressure-tested before shipment. If your application requires pressure seal verification, contact our custom design department.
Regular inspection of the probe cable and connector is recommended to ensure signal integrity. Avoid exceeding the maximum torque values during installation or maintenance to prevent thread damage. The wide operating temperature range (-52°C to +177°C) ensures stable performance even in extreme conditions.
Selection Guide
When selecting a replacement probe, verify the thread size, unthreaded length, overall case length, and total cable length. The 330905-05-13-05-01-00 features an M10X1 thread, 50 mm unthreaded length, 130 mm overall case length, and a 0.5-meter cable with a miniature coaxial ClickLoc connector. This configuration is ideal for installations where a compact probe with a standard connector is required.
For expert advice on compatibility or to discuss your specific application, trust PLC Source PRO as your reliable industrial automation parts supplier. We offer new, original factory-packed products with a 12-month warranty.