Product Overview
The Bently Nevada 330905-00-25-05-12-CN is a precision 3300 NSv proximity probe engineered for reliable vibration and position monitoring in critical rotating machinery. This model features an M10X1 thread, a 250 mm overall case length, and a 0.5-meter FluidLoc cable with a miniature coaxial ClickLoc connector. As part of the proven 3300 NSv series, this probe delivers accurate, real-time data to help prevent unplanned downtime.
This 330905-00-25-05-12-CN probe is mechanically and electrically interchangeable with the previous 3300 RAM probe, simplifying upgrades. Its enhanced chemical resistance makes it ideal for process compressor applications where aggressive media are present.
Technical Specifications
Every parameter below is sourced directly from the manufacturer's data for the 330905-00-25-05-12-CN.
| Parameter |
Value |
| Linear Range |
1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils) from target |
| 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 (with up to 305 m field wiring) |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Cable Type |
75 Ω coaxial, FEP insulated |
| Operating / Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Maximum Torque |
0.56 N•m (5 in•lb) for probe case; connector torque rated 33.9 N•m (300 in•lb) max, recommended 11.3 N•m (100 in•lb) |
Key Features & Benefits
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High Accuracy: ISF of 7.87 V/mm ensures precise measurement over the full linear range.
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Chemical Resistance: PPS tip and Viton O-ring seal withstand harsh process environments.
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Interchangeable: Drop-in replacement for older 3300 RAM probes, minimizing retrofit complexity.
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Robust Construction: AISI 304 stainless steel case offers durability in demanding industrial settings.
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Flexible Cable Options: Available in 0.5, 1, 5, or 7 meter lengths to suit various installations.
Applications
The 330905-00-25-05-12-CN is designed for:
- Vibration monitoring on turbomachinery, compressors, and pumps
- Shaft radial and axial position measurement
- Process compressor applications where chemical resistance is critical
- Retrofit projects replacing older 3300 RAM probes
With its superior side-view characteristics, this probe delivers reliable readings even in tight mounting configurations.
Installation & Setup
Proper installation is essential for accurate measurements. For the 330905-00-25-05-12-CN, follow these guidelines:
- Mount the probe with finger-tight torque (maximum 0.56 N•m) to avoid damaging the threads.
- Maintain a minimum bend radius of 25.4 mm (1.0 in) for the cable to prevent signal degradation.
- For connector-to-connector connections, use the recommended torque values: 11.3 N•m (100 in•lb) for standard cases, and 7.5 N•m (66 in•lb) for the first three threads.
- Set the initial gap to 1.0 mm (40 mils) for optimal linear performance.
Maintenance & Reliability
Routine inspection of the probe and cable can extend service life. Check for any signs of chemical attack or physical damage, especially in harsh environments. The probe's Viton O-ring is designed to seal differential pressure, but it should be inspected periodically. With proper care, this Bently Nevada 330905-00-25-05-12-CN probe will provide years of reliable data, reducing overall maintenance costs.
Buying Guide
When ordering the 330905-00-25-05-12-CN, verify the thread type (M10X1), unthreaded length (00 mm), overall case length (250 mm), total length (0.5 m), and connector type (Miniature coaxial ClickLoc with FluidLoc cable). This model is new, in original factory packing, and backed by a 12-month warranty. For bulk pricing or expedited shipping, contact PLC Source PRO.