Product Overview
When vibration monitoring in process compressors demands superior chemical resistance and reliable gap measurement, the Bently Nevada 330910-00-07-05-02-00 delivers. This 3300 NSv proximity probe, part of the 3300 series, is engineered for eddy-current displacement sensing. It replaces the earlier 3300 RAM probe with enhanced side-view characteristics and improved chemical durability, making it a robust choice for critical rotating machinery.
The 330910-00-07-05-02-00 features an M10X1 thread with armor, a 0.5-meter total length, and a miniature coaxial ClickLoc connector. It is fully interchangeable with Bently Nevada's previous 3300 RAM probes, simplifying upgrades.
Key Features & Benefits
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Chemical Resistance: Increased resistance compared to the 3300 RAM probe, ideal for process compressor environments.
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Interchangeability: Mechanically and electrically compatible with 3300 RAM probes and extension cables.
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Linear Range: 1.5 mm (60 mils) with recommended gap of 1.0 mm (40 mils).
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Scale Factor: 7.87 V/mm (200 mV/mil) with interchangeability error of +12.5%/-20%.
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Temperature Range: Operates from -52°C to +177°C (-62°F to +351°F).
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Robust Construction: Polyphenylene sulfide (PPS) tip and AISI 304 stainless steel case.
Technical Specifications
| Parameter |
Value |
| Probe DC Resistance (0.5 m) |
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 |
| Field Wiring |
0.2 to 1.5 mm² (16 to 24 AWG); 0.25 to 0.75 mm² (18 to 23 AWG) with ferrules; max 305 m (1,000 ft) |
| Linear Range |
1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils) |
| Recommended Gap |
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 |
| Target Size (Flat Target) |
Min 8.9 mm (0.35 in); recommended min 13 mm (0.5 in) |
| 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, or 7 m |
| Maximum Torque |
0.56 N•m (5 in•lb) |
| 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 Pressure Seal |
Viton O-ring; not pressure tested prior to shipment |
| Connector-to-Connector Torque (Case) |
Max 33.9 N•m (300 in•lb); recommended 11.3 N•m (100 in•lb) |
| Connector-to-Connector Torque (First 3 Threads) |
Max 22.6 N•m (200 in•lb); recommended 7.5 N•m (66 in•lb) |
| Thread Engagement (3/8-24) |
Max 0.563 in |
| System Weight (Probe) |
Approximately 14 to 150 g (0.5 to 5.3 oz) |
Industry Applications
The 330910-00-07-05-02-00 excels in process compressor applications where chemical resistance is critical. Its superior side-view characteristics compared to the 3000-series 190 probe allow accurate gapping at the same distance from the target. Typical uses include:
- Shaft vibration monitoring in compressors and turbines
- Axial position measurement in rotating machinery
- Radial vibration detection in pumps and motors
- Thrust bearing wear monitoring
Installation & Setup Guidance
Proper installation ensures accurate readings. Follow these guidelines:
- Mount the probe with finger-tight torque; do not exceed 0.56 N•m (5 in•lb).
- Maintain a minimum bend radius of 25.4 mm (1.0 in) for the cable.
- For connector-to-connector torque, use recommended values: 11.3 N•m (100 in•lb) for the case, 7.5 N•m (66 in•lb) for the first three threads.
- Set the gap to 1.0 mm (40 mils) for optimal linearity.
- Use three-conductor shielded triad cable for field wiring; max length 305 m (1,000 ft).
Maintenance & Reliability
Regular inspection of the probe tip and cable is essential. Check for physical damage, contamination, or loose connections. The PPS tip resists chemicals, but periodic cleaning may be required in harsh environments. Ensure the probe remains within the temperature range to avoid thermal drift. Given the probe's robust construction, maintenance is minimal, reducing downtime and total cost of ownership.
Selection Guide & Purchasing Advice
Before purchasing, verify the following:
- Thread type and length: M10X1 with 70 mm overall case length.
- Cable length: 0.5 meter (20 in) with standard cable and miniature coaxial ClickLoc connector.
- Agency approval: Not required for this option.
- Compatibility with existing 3300 XL NSv Proximitor Sensors and monitors.
PLC Source PRO offers this Bently Nevada 330910-00-07-05-02-00 as new, original factory-packed with a 12-month warranty. Ensure your system meets the field wiring requirements for optimal performance.