Product Overview
The Bently Nevada 330904-02-20-05-01-00 is a 3300 NSv proximity probe designed for precise shaft vibration and position monitoring in critical rotating machinery. As a key component of the 3300 NSv series, this industrial automation module delivers reliable performance in process compressor applications, offering enhanced chemical resistance over earlier 3300 RAM probes. With a 0.5-meter armored cable and M8x1 thread, the 330904-02-20-05-01-00 integrates seamlessly with Bently Nevada monitoring systems.
This new, factory-packed unit ensures accurate measurement across a 1.5 mm linear range, making it an ideal choice for turbomachinery, pumps, and motors where early fault detection prevents costly downtime.
Technical Specifications
The table below lists the key parameters of the Bently Nevada 330904-02-20-05-01-00. All values are sourced directly from the manufacturer's documentation.
| Parameter |
Value |
| Linear Range |
1.5 mm (60 mils) from 0.25 to 1.75 mm (10 to 70 mils) approx. -1 to -13 Vdc |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Incremental Scale Factor (ISF) |
7.87 V/mm (200 mV/mil) +12.5%/-20% including interchangeability error |
| 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 |
| Target Size (flat target) |
Minimum 8.9 mm diameter; recommended 13 mm diameter |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Probe Cable |
75 Ω coaxial, FEP insulated, total lengths 0.5, 1, 5, or 7 meters |
| Recommended Torque |
Finger tight; maximum 0.56 N•m (5 in•lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) with or without SST armor |
| Operating/Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Case Thread |
M8x1, maximum engagement 12 mm |
| Connector-to-Connector Torque |
Maximum 7.3 N•m (65 in•lb); recommended 5.1 N•m (45 in•lb) |
Performance Characteristics
The 330904-02-20-05-01-00 delivers exceptional linearity and repeatability. Its incremental scale factor of 7.87 V/mm ensures consistent output across the entire linear range, while the DSL of less than ±0.06 mm guarantees accurate displacement readings. The probe's frequency response up to 10 kHz captures high-speed vibration events, making it suitable for real-time condition monitoring.
Compared to previous 3300 RAM probes, the NSv version offers superior side-view characteristics and enhanced chemical resistance, reducing measurement errors and extending service life in harsh environments.
Applications
This industrial automation module is widely used in:
-
Process Compressors – where chemical resistance and reliable clearance measurements are critical.
-
Turbomachinery – for shaft vibration and axial position monitoring.
-
Pumps and Motors – to detect early bearing wear and misalignment.
In each scenario, the 330904-02-20-05-01-00 helps maintenance teams identify issues before they escalate, minimizing unplanned downtime and repair costs.
Installation & Setup
Proper installation is essential for accurate measurements. Follow these guidelines:
- Mount the probe with the recommended torque (finger tight, max 0.56 N•m) to avoid damaging the threads.
- Maintain a minimum bend radius of 25.4 mm for the cable to prevent internal damage.
- Set the initial gap to approximately 1.0 mm (40 mils) for optimal linear range.
- Use three-conductor shielded triad cable for field wiring, with a maximum length of 305 meters to preserve signal integrity.
Maintenance & Reliability
Regular inspection of the probe tip and cable is recommended to ensure consistent performance. Check for any physical damage, contamination, or corrosion, especially in aggressive media environments. The probe's stainless steel case and PPS tip are designed for durability, but periodic cleaning with a soft cloth and mild solvent can maintain accuracy.
Given its robust construction and wide temperature range, the 330904-02-20-05-01-00 offers long-term reliability, reducing the total cost of ownership through fewer replacements and less frequent recalibration.
Selection Guide
When ordering a replacement or new installation, verify the exact part number 330904-02-20-05-01-00 to match your system requirements. Ensure the probe length, thread type, and connector options align with your existing setup. PLC Source PRO provides genuine, factory-new units with a 12-month warranty, ensuring you receive authentic Bently Nevada components.
For technical assistance or to confirm compatibility with your monitoring system, contact our sales team before placing an order.