Product Overview
The Bently Nevada 330905-05-10-05-02-05 is a 3300 NSv proximity probe engineered for precise vibration and position monitoring in rotating machinery. This industrial automation module replaces the legacy 3300 RAM probe while offering superior chemical resistance and improved side-view characteristics. With an M10×1 thread and a 0.5-meter cable, this probe integrates seamlessly into existing Bently Nevada monitoring systems.
This probe is part of the 3300 NSv series, designed for demanding process compressor applications where chemical exposure is a concern. Its polyphenylene sulfide (PPS) tip and AISI 304 stainless steel case ensure durability in harsh environments. The probe operates across a wide temperature range of -52°C to +177°C, making it suitable for extreme industrial conditions.
Technical Specifications
Key performance parameters for the 330905-05-10-05-02-05 include:
-
Linear Range: 1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils) from target
-
Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) with interchangeability error +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 with up to 305 meters of field wiring
-
Probe DC Resistance: 4.0 ± 0.5 ohms (for 0.5 m probe)
-
Extension Cable Capacitance: 69.9 pF/m (21.3 pF/ft) typical
-
Operating/Storage Temperature: -52°C to +177°C (-62°F to +351°F)
-
Probe Tip Material: Polyphenylene sulfide (PPS)
-
Probe Case Material: AISI 304 stainless steel
-
Probe Cable: 75 Ω coaxial, FEP insulated, 0.5 m total length
-
Maximum Torque: 0.56 N•m (5 in•lb) recommended
-
Minimum Bend Radius: 25.4 mm (1.0 in)
Industry Applications
This proximity probe is ideal for monitoring shaft vibration and axial position in turbomachinery, compressors, and pumps. Its enhanced chemical resistance allows deployment in process compressor applications where corrosive media are present. The 330905-05-10-05-02-05 also suits retrofit projects, replacing older 3300 RAM probes without mechanical or electrical modifications.
In a typical scenario, the probe is mounted near a shaft journal, measuring displacement with high accuracy. The linear range of 1.5 mm and a recommended gap setting of 1.0 mm (40 mils) ensure reliable readings. For axial position monitoring on shafts smaller than 13 mm, the scale factor may change; reducing the gap helps stabilize measurements—a practical tip for maintenance teams.
Installation & Setup Guidance
Proper installation is critical for accurate measurements. Follow these steps:
- Mount the probe with an M10×1 thread, ensuring the case is finger-tight. Do not exceed the recommended torque of 7.5 N•m (66 in•lb) for the first three threads.
- Maintain the minimum bend radius of 25.4 mm for the cable to prevent damage.
- Connect the miniature coaxial ClickLoc connector securely. The standard cable is 0.5 meter long.
- For field wiring, use a three-conductor shielded triad cable with a maximum length of 305 meters between the Proximitor Sensor and the monitor. Wire sizes should be 0.2 to 1.5 mm² (16 to 24 AWG).
- Set the recommended gap to 1.0 mm (40 mils) from the target surface.
Maintenance & Reliability
Routine inspection of the probe tip and cable is recommended to ensure reliable operation. Check for signs of chemical attack or physical damage, as the PPS tip and stainless steel case offer robust protection. The probe is designed to seal differential pressure between tip and case using a Viton O-ring; however, it is not pressure-tested before shipment. For applications requiring a verified pressure seal, contact the manufacturer's custom design department.
Given the wide operating temperature range, the probe can be used in extreme environments, but avoid exceeding the specified limits. The extension cable's DC resistance (center conductor: 0.220 Ω/m, shield: 0.066 Ω/m) should be monitored for signs of degradation. Regular calibration checks against the ISF tolerance will maintain measurement accuracy.
Buying Guide
Before purchasing, verify the exact part number 330905-05-10-05-02-05 to ensure it matches your system requirements. This probe includes a 0.5-meter cable and an M10×1 thread without armor—confirm these options align with your installation needs. PLC Source PRO offers this item as new and original in factory packing, backed by a 12-month warranty. For volume orders or technical consultations, our team is ready to assist.