Product Overview
The Bently Nevada 330709-000-040-50-12-05 3300 XL 11 mm Proximity Probes deliver precise displacement and vibration measurements for rotating machinery. This model features a 5.0 meter cable, M16x1.5 thread without armor, and a polyphenylene sulfide (PPS) probe tip for durability. Designed for use with the five meter Proximitor Sensor, it ensures accurate readings in harsh industrial environments.
Technical Specifications
| Parameter |
Value |
| Probe Length |
5.0 meters (16.4 feet) |
| Probe DC Resistance (RPROBE) |
7.2 ± 0.8 ohms |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Probe Case Thread |
M16 x 1.5 |
| Maximum Thread Engagement |
24 mm |
| Recommended Probe Case Torque |
21.1 N·m (187 in·lb) |
| Operating Temperature Range |
-52°C to +177°C (-62°F to +351°F) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Connector Type |
Miniature coaxial ClickLoc, FluidLoc cable |
These specifications are critical for maintaining signal integrity and avoiding cross-talk. The 330709-000-040-50-12-05 provides a resistance of 7.2 ± 0.8 ohms, ensuring consistent performance with the matching Proximitor.
Industry Applications
The Bently Nevada 330709-000-040-50-12-05 3300 XL 11 mm Proximity Probes are ideal for monitoring shaft vibration and axial position in turbines, compressors, pumps, and generators. The 5.0 m cable length suits installations where the sensor must be placed away from the machine casing. The probe’s wide temperature range allows operation in both hot and cold environments, while the PPS tip resists chemical attack.
Installation Guidelines
Proper installation ensures long-term reliability. When mounting the 330709-000-040-50-12-05, use the recommended torque of 21.1 N·m (187 in·lb) on the M16x1.5 probe case. Do not exceed 24 mm thread engagement to avoid damage. Maintain a minimum bend radius of 25.4 mm on the cable to prevent signal degradation. The connector should be finger-tightened, with a maximum torque of 0.565 N·m (5 in·lb) to avoid connector damage.
Troubleshooting Common Issues
Common problems with proximity probes include cross-talk and temperature-related failures. The 330709-000-040-50-12-05 minimizes cross-talk by requiring a minimum target diameter of 30.5 mm (1.2 in) and a minimum shaft diameter of 152 mm (6.0 in). Exposing the probe to temperatures below -34°C (-30°F) can compromise the pressure seal, so pre-warming is recommended in cold starts. If resistance readings drift outside the 7.2 ± 0.8 ohm range, inspect the connector and cable for damage.
Selection Guide
When ordering the Bently Nevada 330709-000-040-50-12-05, verify the cable length and thread configuration match your system. This probe works exclusively with the 5 meter Proximitor Sensor. For assistance in selecting the correct proximity probe, contact UBEST Automation (ubest101) at ubest101.myshopify.com for expert guidance.