Product Overview
The Bently Nevada 330905-00-25-05-12-05 is a 3300 NSv proximity probe designed for reliable displacement and vibration measurement in rotating machinery. This Industrial Automation Module offers enhanced chemical resistance and improved side-view characteristics compared to earlier 3300 RAM probes, making it ideal for process compressor applications. With a 0.5-meter total length, M10x1 thread, and miniature coaxial ClickLoc connector with FluidLoc cable, this probe delivers precise, repeatable measurements.
Key Features & Benefits
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Enhanced Chemical Resistance: The NSv probe withstands harsher environments than the 3300 RAM, expanding its use in demanding process applications.
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Superior Side-View Performance: Better gapping accuracy at the same distance from the target compared to 3000-series 190 probes.
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Interchangeable with 3300 RAM: Mechanically and electrically compatible with previous 3300 RAM probes and extension cables, simplifying upgrades.
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Multiple Approvals: Agency approval option -05 ensures compliance for global installations.
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New & Original: Factory-packed unit with 12-month warranty.
Technical Specifications
| Parameter |
Value |
| Probe dc Resistance (0.5m) |
4.0 ± 0.5 ohms |
| Extension Cable dc Resistance (Center) |
0.220 Ω/m (0.067 Ω/ft) |
| Extension Cable dc Resistance (Shield) |
0.066 Ω/m (0.020 Ω/ft) |
| Extension Cable Capacitance |
69.9 pF/m (21.3 pF/ft) typical |
| Linear Range |
1.5 mm (60 mils) from 0.25 to 1.75 mm (10 to 70 mils) |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) +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 (up to 305 m field wiring) |
| Target Size (flat) |
Minimum 8.9 mm (0.35 in) dia; Recommended 13 mm (0.5 in) dia |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Probe Cable |
75 Ω coaxial, FEP insulated, lengths 0.5/1/5/7 m |
| Maximum Torque |
0.56 N•m (5 in•lb); Recommended finger tight |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Operating Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Case Torque (M10x1) |
Max 22.6 N•m (200 in•lb); Recommended 7.5 N•m (66 in•lb) |
| Thread Engagement Max |
15 mm |
Industry Applications
The 330905-00-25-05-12-05 excels in radial vibration and axial position monitoring of rotating equipment. Typical applications include:
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Process Compressors: Its enhanced chemical resistance allows reliable operation in aggressive media.
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Turbines and Pumps: Provides accurate shaft displacement data for condition monitoring.
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Motors and Generators: Helps detect misalignment and bearing wear early.
For example, in a process compressor, the probe's increased chemical resistance minimizes downtime due to sensor failure, directly improving plant availability.
Installation & Setup Guidance
Proper installation is critical for accurate readings. Follow these steps:
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Mounting: Use the M10x1 thread and tighten to the recommended torque of 7.5 N•m (66 in•lb) for the first three threads. Do not exceed 22.6 N•m (200 in•lb).
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Gap Setting: Set the initial gap to 1.0 mm (40 mils) from the target surface.
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Field Wiring: Use three-conductor shielded triad cable (0.2 to 1.5 mm² / 16 to 24 AWG). For ferrules, use 0.25 to 0.75 mm² (18 to 23 AWG). Maximum cable length between the Proximitor Sensor and monitor is 305 meters (1,000 feet).
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Bend Radius: Maintain a minimum bend radius of 25.4 mm (1.0 in) for the probe cable to avoid damage.
Maintenance & Reliability
Routine inspection of the probe and cable is recommended. Check for physical damage, especially at the probe tip and cable bends. Ensure the target surface is clean and free of debris. The probe is designed to seal differential pressure with a Viton O-ring; however, it is not pressure tested prior to shipment. If your application requires a pressure seal test, contact our custom design department. Operating within the specified temperature range (-52°C to +177°C) ensures long-term reliability.
Selection Guide & Purchasing Advice
Before ordering, verify your system requirements: probe thread size (M10x1), unthreaded length (00 mm), overall case length (250 mm), total length (0.5 m), and connector type (miniature coaxial ClickLoc with FluidLoc cable). The 330905-00-25-05-12-05 is new and original, backed by a 12-month factory warranty. For dependable sourcing, PLC Source PRO offers genuine parts with fast worldwide shipping.