Product Introduction
When unplanned downtime strikes due to proximity probe failure, the Bently Nevada 330708-00-10-10-12-05 3300 XL 11 mm probe delivers a robust solution. Designed for critical rotating machinery, this probe withstands extreme temperatures from -52°C to +177°C and seals against differential pressure with a Viton O-ring. The 330708-00-10-10-12-05 uses a polyphenylene sulfide (PPS) tip and 304 SST case for durability in harsh environments. Part of the 3300 XL series, it ensures accurate vibration measurement in steam turbines, compressors, and pumps.
Technical Specifications
| Parameter |
Value |
| Probe Type |
3300 XL 11 mm Proximity Probe |
| Thread Size |
5/8-18 UNF |
| Unthreaded Length |
0 in |
| Overall Case Length |
1.0 in |
| Total Length |
1.0 metre (3.3 feet) |
| Connector |
Miniature coaxial ClickLoc, FluidLoc cable |
| Agency Approvals |
Multiple Approvals |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Cable Specification |
75 Ω triaxial, FEP insulated (1, 5, or 9 m) |
| Operating Temperature |
-52°C to +177°C |
| Storage Temperature |
-52°C to +177°C |
| Maximum Thread Engagement |
0.938 in (5/8-18) |
| Maximum Case Torque |
45.2 N·m (400 in·lb) |
| Recommended Case Torque |
15.2 N·m (133 in·lb) |
| Connector Torque (max) |
0.565 N·m (5 in·lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Shipping Weight |
0.17 kg |
Industry Applications
The Bently Nevada 330708-00-10-10-12-05 excels in vibration monitoring for rotating assets. In a steam turbine, accurate shaft displacement measurement helps prevent blade rub and bearing wear. For a centrifugal compressor operating at high speeds, the probe’s 5/8-18 UNF thread and 1.0 m cable length simplify retrofit. In a large pump, the PPS tip resists chemical attack, extending service life. Each application benefits from the probe’s wide temperature range and pressure sealing capability, reducing false alarms from thermal or pressure changes.
Installation & Setup Guidance
Proper mounting ensures reliable data. Thread the 330708-00-10-10-12-05 into a 5/8-18 UNF hole using a maximum engagement of 0.938 in. Torque the case to 15.2 N·m (133 in·lb) — exceeding 45.2 N·m may damage the probe. For the miniature coaxial ClickLoc connector, apply only finger-tight torque (max 0.565 N·m). Route cable with a minimum bend radius of 25.4 mm (1.0 in) to avoid internal damage. Position the probe tip with a specified gap per the 3300 XL system manual; typically 1.27 mm (50 mils) for 11 mm probes. Do not use sealing tape on threads, as it can affect electrical continuity.
Maintenance & Reliability
Regularly inspect the probe cable for cuts or kinks, especially near the connector. The 330708-00-10-10-12-05 uses a Viton O-ring to seal differential pressure; avoid exposing the probe to temperatures below -34°C for extended periods, as this may cause premature seal failure. Check that the probe case and tip remain free of debris. The 3300 XL probe requires no periodic calibration, but verifying DC resistance (5.9 ±0.5 ohms for 1 m length) during installation confirms cable integrity. Store spare probes in a clean, dry environment within the -52°C to +177°C range.
Troubleshooting & Common Issues
If the Bently Nevada 330708-00-10-10-12-05 outputs erratic readings, first verify connector torque: an overtightened ClickLoc can damage internal wiring, while a loose connector introduces noise. For static gap errors, check that the probe is not bottomed out in the mounting hole — reduce thread engagement if needed. A sudden loss of signal may indicate a broken cable; inspect the triaxial FEP insulation near bend points. Pressure seal leaks typically occur after thermal cycling below -34°C; allow the probe to warm gradually before restarting the machine. If these steps fail, substitute a known-good probe to isolate the fault. For genuine replacement parts, contact UBEST Automation.