Product Overview
When industrial machinery vibrations threaten equipment reliability, the Bently Nevada 330709-000-040-50-02-00 3300 XL 11 mm Proximity Probe delivers precise shaft displacement measurements to protect your assets. This probe features a 5.0 meter (16.4 feet) cable with a miniature coaxial ClickLoc connector and an M16 x 1.5 threaded case for secure mounting. Part of the 3300 XL series, the 330709-000-040-50-02-00 is designed for non-contact vibration and position monitoring in critical rotating machinery such as steam turbines, compressors, and large motors. The 5.0 meter total length is specifically engineered for use with the corresponding five meter Proximitor Sensor, ensuring accurate and reliable signal transmission.
Key Technical Specifications
| Parameter |
Value |
| Unthreaded Length |
0 mm |
| Overall Case Length |
40 mm |
| Total Length |
5.0 meters (16.4 feet) |
| Connector Type |
Miniature coaxial ClickLoc, standard cable |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Probe Cable |
75 Ω triaxial, FEP insulated |
| Probe DC Resistance (5.0 m) |
7.2 ± 0.8 ohms |
| Minimum Target Diameter |
30.5 mm (1.2 in) |
| Minimum Shaft Diameter |
152 mm (6.0 in) |
| Probe Case Torque (M16x1.5) |
63.3 N·m / 21.1 N·m (consult installation guide) |
| Connector-to-Connector Torque (max) |
0.565 N·m (5 in·lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Operating Temperature Range |
-52°C to +177°C (-62°F to +351°F) |
| Maximum Thread Engagement |
24 mm |
Note: Two torque values are specified for the probe case; ensure correct value for your thread size and application.
Installation Guidance
Proper installation of the Bently Nevada 330709-000-040-50-02-00 is essential for accurate readings. Thread the M16x1.5 case into the mounting hole up to a maximum engagement of 24 mm. Apply the recommended torque (63.3 N·m or 21.1 N·m as appropriate) to prevent leakage or damage. For the miniature coaxial ClickLoc connector, tighten only to finger tight torque; the maximum torque is 0.565 N·m (5 in·lb) to avoid connector deformation. Route the cable with a minimum bend radius of 25.4 mm (1.0 in) and avoid sharp bends that could stress the FEP insulation. This probe is intended exclusively for use with the five meter Proximitor Sensor – do not connect to sensors of different lengths.
Maintenance and Reliability
The Bently Nevada 330709-000-040-50-02-00 operates reliably across a wide temperature range from -52°C to +177°C. However, exposure to temperatures below -34°C (30°F) may cause premature failure of the pressure seal, so avoid extended cold storage. Regularly inspect the cable and connector for signs of wear, chemical attack, or moisture ingress. The 75 Ω triaxial cable with FEP insulation provides excellent resistance to harsh industrial environments. For consistent performance, periodically verify that the dc resistance between center conductor and outer conductor remains within 7.2 ± 0.8 ohms for the 5.0 meter probe. Maintain strain relief at the connector and probe case to prevent intermittent signals.
Applications and Use Cases
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Steam Turbine Vibration Monitoring: The 330709-000-040-50-02-00 provides non-contact shaft displacement measurement critical for turbine health monitoring and predictive maintenance.
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Compressor Protection: Install on centrifugal and reciprocating compressors to detect rotor instability, imbalance, and thrust position changes.
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Motor and Generator Position Sensing: Use for axial position monitoring in large electric machines to prevent rotor-to-stator contact.
Selection Guide
Before purchasing the Bently Nevada 330709-000-040-50-02-00 3300 XL 11 mm Proximity Probe, verify the total length (5.0 meters) matches your system's requirements and that you have the corresponding five meter Proximitor Sensor. Confirm the thread size (M16x1.5) and connector type (miniature coaxial ClickLoc) are compatible with your mounting and signal conditioning hardware. Agency approval is set to "Not required" for this variant; if your application demands certification, contact UBEST Automation for options. For genuine Bently Nevada parts and reliable supply chain support, choose UBEST Automation as your trusted partner.