Product Overview
When vibration monitoring in rotating machinery requires precise displacement measurement, the Bently Nevada 330709-00-120-10-02-00 3300 XL 11 mm Proximity Probe delivers reliable performance. This probe is part of the renowned 3300 XL series, designed for eddy current sensing in industrial environments. Manufactured in the USA, it features an M16 x 1.5 thread, a 1.0 meter (3.3 feet) total length, and a miniature coaxial ClickLoc connector with standard cable. Ideal for turbines, compressors, and pumps, this probe provides accurate shaft displacement and position data essential for predictive maintenance.
Technical Specifications
The Bently Nevada 330709-00-120-10-02-00 incorporates robust engineering to withstand harsh conditions. Key parameters extracted from product data include:
| Parameter |
Value |
| Probe dc Resistance (1.0 m length) |
5.9 ± 0.5 ohms |
| Cross-talk Limitation (flat target) |
Min 30.5 mm (1.2 in) diameter |
| Cross-talk Limitation (shaft) |
Min 152 mm (6.0 in) diameter |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Cable Specification |
75 Ω triaxial, FEP insulated (1, 5, or 9 m) |
| Probe Case Torque (M16x1.5) |
21.1 N·m (187 in·lb) |
| Connector-to-connector Torque (max) |
0.565 N·m (5 in·lb) |
| Min Bend Radius (with/without armor) |
25.4 mm (1.0 in) |
| Probe Case Thread |
M16x1.5 |
| Max Thread Engagement Length |
24 mm |
| Operating & Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
These specs ensure the 330709-00-120-10-02-00 performs consistently in demanding rotating machinery applications.
Industry Applications
The Bently Nevada 330709-00-120-10-02-00 is widely used in critical rotating equipment. In steam turbines, it monitors shaft vibration and radial position, helping operators avoid catastrophic failures. In centrifugal compressors, the probe detects thrust bearing wear by measuring axial displacement. For large pumps, it provides real-time data on shaft eccentricity. These applications benefit from the probe’s high-temperature tolerance and robust stainless steel construction, reducing unexpected downtime.
Installation and Setup Guidance
Proper installation of the Bently Nevada 330709-00-120-10-02-00 ensures accurate readings. Follow these guidelines:
- Use the recommended probe case torque of 21.1 N·m for the M16x1.5 thread; over-torquing may damage the probe.
- Apply finger-tight torque on connectors, with a maximum of 0.565 N·m (5 in·lb) to avoid connector deformation.
- Maintain a minimum bend radius of 25.4 mm (1.0 in) for the cable, whether armored or not, to prevent internal conductor stress.
- Ensure the unthreaded length option is 0 mm as specified (part number suffix -00).
- For cross-talk reduction, use a target flat surface diameter of at least 30.5 mm and shaft diameter of 152 mm.
These steps minimize common installation errors that lead to noisy signals or premature probe failure.
Maintenance and Reliability
The 330709-00-120-10-02-00 is built for long-term reliability. Its PPS tip and 304 stainless steel case resist chemical exposure and mechanical wear. The operating temperature range of -52°C to +177°C suits most industrial environments, but avoid prolonged exposure below -34°C as it may compromise the pressure seal. Inspect the connector and cable periodically for damage, especially in high-vibration areas. The probe’s dc resistance should remain within 5.9 ± 0.5 ohms; deviations indicate possible cable or element issues. Regular calibration checks every 12 months are recommended to maintain measurement accuracy.
Selection Guide and Purchasing Advice
Before purchasing the Bently Nevada 330709-00-120-10-02-00, verify your system requirements: ensure the M16x1.5 thread matches the mounting hole, the 1.0 m cable length fits your installation, and the ClickLoc connector is compatible with your extension cable. For alternative lengths, consider other part numbers in the 330709 series. UBEST Automation (ubest101) stocks this exact model and offers competitive pricing for both single units and bulk orders. Contact our team for assistance with matching your Bently Nevada system needs.