Product Introduction
The Bently Nevada 330708-00-25-90-02-00 is a 3300 XL 11 mm proximity probe designed for precision vibration and position measurement in rotating machinery. This probe is a direct replacement for older non-XL 3300 series probes and offers enhanced performance with improved linearity and temperature stability. The 330708-00-25-90-02-00 features a 5/8-18 UNF thread, no armor, and a 9.0-meter standard cable with a miniature coaxial ClickLoc connector. It is an ideal upgrade for applications requiring reliable, high-accuracy proximity sensing in harsh industrial environments.
Technical Specifications
| Parameter |
Value |
| Model |
330708-00-25-90-02-00 |
| Brand |
Bently Nevada |
| Product Type |
3300 XL 11 mm Proximity Probe |
| Thread Size |
5/8-18 UNF |
| Armor |
Without armor |
| Unthreaded Length Option |
0 inches |
| Overall Case Length Option |
2.5 inches |
| Total Length Option |
9.0 meters (29.5 feet) |
| Connector and Cable Type |
Miniature coaxial ClickLoc connector, standard cable |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Cable Specification |
75 Ω triaxial, FEP insulated |
| Available Cable Lengths |
1, 5, 9 meters |
| Operating and Storage Temperature |
-51°C to +177°C (-60°F to +351°F) |
| DC Resistance (9m length) |
8.5 ± 1.1 ohms |
| Maximum Thread Engagement (5/8-18) |
0.938 inches |
| Probe Case Torque (Recommended) |
15.2 N·m (133 in·lb) |
| Probe Case Torque (Maximum) |
45.2 N·m (400 in·lb) |
| Connector Torque (Recommended) |
Finger tight |
| Connector Torque (Maximum) |
0.565 N·m (5 in·lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Shipping Weight |
0.17 kg |
Industry Applications
The 330708-00-25-90-02-00 is commonly used in turbomachinery, compressors, pumps, and motors for monitoring shaft vibration and radial position. Its 11 mm diameter and standard cable length make it suitable for retrofitting existing machine trains. In a typical application, upgrading from a non-XL 3300 probe to the 330708-00-25-90-02-00 provides improved linearity and reduced drift, enhancing overall machinery protection system performance. The probe's PPS tip resists chemical attack, making it suitable for use in oil and gas, petrochemical, and power generation environments.
Installation and Setup Guidance
When installing the 330708-00-25-90-02-00, ensure the probe tip is clean and free of debris. Thread the probe into a pre-tapped hole using the recommended torque of 15.2 N·m. Avoid exceeding the maximum torque of 45.2 N·m to prevent damage to the case or thread. Connect the coaxial ClickLoc connector by hand-tightening only; use a torque wrench set to 0.565 N·m if needed. Verify the total cable length (9.0 m) is appropriate for your installation; avoid bending the cable below a radius of 25.4 mm. For best performance, maintain a clean gap between the probe tip and the target surface as specified in the system calibration.
Maintenance and Reliability
Regularly inspect the probe cable and connector for signs of wear or corrosion. The FEP insulated triaxial cable resists moisture and high temperatures, but periodic checks are recommended in harsh environments. The probe's stainless steel case and PPS tip provide excellent corrosion resistance, allowing long service intervals. If the probe operates in temperatures below -34°C, the pressure seal may be affected; plan inspections accordingly. Following a scheduled maintenance routine maximizes the probe's lifespan and ensures consistent measurements, reducing unscheduled downtime and replacement costs.
Selection Guide and Purchasing Advice
Before purchasing the 330708-00-25-90-02-00, confirm that your system requires a 5/8-18 UNF thread, no armor, and a 9.0 m cable with ClickLoc connector. Verify compatibility with your monitor or conditioner. For other thread options, cable lengths, or armor configurations, contact UBEST Automation for alternative models. As a reliable supplier of industrial automation parts, UBEST Automation ensures genuine Bently Nevada products. For further assistance, reach out to our sales team.