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This 5 mm proximity sensor delivers precise vibration and position measurements for high-speed rotating machinery. It operates as a key component within the Bently Nevada 3300 XL transducer system for predictive maintenance. The sensor uses eddy current principles to generate a voltage signal that varies with the distance to the target surface. Additionally, it meets stringent API 670 standards for linear range, accuracy, and thermal stability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 330171-08-32-10-02-05 |
| Product Type | 3300 XL 5mm Proximity Sensor |
| Thread Specification | 1/4-28 UNF (Option 08) |
| Unthreaded Length | 31.8 mm / 1.25 in (Option 32) |
| Overall Case Length | 98.6 mm / 3.88 in (Option 10) |
| Total System Length | 5.0 meters / 16.4 feet (Option 02) |
| Connector Type | Miniature coaxial ClickLoc (Option 05) |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Case Material | AISI 303/304 stainless steel |
| Cable Insulation | Fluoroethylene propylene (FEP) |
| Linear Range | 1.27 mm (50 mils) from 0.25 to 1.52 mm gap |
| Recommended Gap | 0.76 mm @ -9 VDC (approx. 30 mils) |
| Sensitivity | 7.87 V/mm (200 mV/mil) ±5% |
| Operating Temperature | -52°C to +177°C (standard) |
| Weight | 295 grams |
| Approvals | CSA, ATEX, IECEx (Option 05) |
Design and Installation Features
This sensor employs a 1/4-28 UNF imperial thread for mounting in standard machine casings. The 31.8 mm unthreaded length positions the tip precisely for optimal sensitivity. Its 98.6 mm overall case length suits applications requiring deeper reach into turbine housings. Additionally, the 5.0 meter total cable length connects directly to a Proximitor sensor without intermediate extension cables. This design minimizes signal loss and reduces installation complexity.
Performance and Applications
This sensor excels at measuring radial vibration, thrust position, and eccentricity in turbomachinery. It also performs phase reference (Keyphasor) detection for speed and timing measurements. The 3300 XL 5mm system offers full interchangeability of probes, extension cables, and Proximitor sensors. Consequently, users can replace individual components without recalibration, saving valuable maintenance time.
Environmental Compliance
The sensor operates reliably across extreme temperatures from -52°C to +177°C. Its PPS tip and stainless steel case resist harsh industrial chemicals and moisture. The FEP cable insulation maintains flexibility and integrity in demanding environments. Therefore, this probe suits applications in power generation, oil and gas, and heavy industry.