Product Introduction
With a 5-meter total length and 75 Ω triaxial cable, the Bently Nevada 330708-00-10-50-12-00 3300 XL 11 mm Proximity Probe delivers precise vibration measurements in critical rotating machinery. This probe is designed for continuous monitoring in demanding industrial environments, featuring a polyphenylene sulfide (PPS) tip and AISI 304 stainless steel case for durability. The 330708-00-10-50-12-00 operates across a wide temperature range from -52°C to +177°C, making it suitable for applications near turbines, compressors, and pumps.
Technical Specifications Breakdown
The following table summarizes key parameters for the Bently Nevada 330708-00-10-50-12-00 3300 XL 11 mm Proximity Probe:
| Parameter |
Value |
| Total Probe Length |
5.0 meters (16.4 feet) |
| Probe DC Resistance (RPROBE) |
7.2 ± 0.8 ohms |
| Operating & Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Case Thread |
5/8-18 UNF |
| Recommended Probe Case Torque |
15.2 N•m (133 in•lb) |
| Maximum Probe Case Torque |
45.2 N•m (400 in•lb) |
| Cable Type |
75 Ω triaxial, FEP insulated |
| Connector Type |
Miniature coaxial ClickLoc with FluidLoc cable |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Shipping Weight |
0.17 kg |
Industry Applications
The 330708-00-10-50-12-00 excels in monitoring shaft vibration and position in rotating equipment. Common applications include steam turbines, centrifugal compressors, large pumps, and generators. For example, in a high-speed turbine, the probe's 5.0-meter cable allows flexible placement relative to the monitoring system, while the 5/8-18 thread ensures secure mounting in standard bearing housing ports. The PPS tip resists chemical attack in oil-lubricated environments, extending service life.
Installation & Setup Guidance
Proper installation is critical for accurate readings. For the Bently Nevada 330708-00-10-50-12-00 3300 XL probe, ensure the mounting hole is clean and threaded to 5/8-18 UNF. Apply recommended torque of 15.2 N•m; do not exceed 45.2 N•m to avoid thread damage. The connector-to-connector torque is finger-tight only, with maximum 0.565 N•m (5 in•lb). Avoid bending the cable tighter than 25.4 mm (1.0 in) radius. When operating below -34°C (-30°F), note that premature pressure seal failure may occur; preheat the probe if necessary.
Maintenance & Reliability
Routine maintenance for the 330708-00-10-50-12-00 includes periodic inspection of the probe cable for cuts or kinks, especially at the connector. The Viton O-ring pressure seal should be checked after exposure to extreme temperatures. Because the probe is not pressure tested before shipment, users should verify seal integrity in high-pressure applications. The wide temperature tolerance reduces thermal stress, but avoid rapid temperature swings exceeding the specified range.
Troubleshooting & Common Issues
Common problems with proximity probes like the 330708-00-10-50-12-00 include intermittent signal loss due to cable connector looseness (tighten to finger-tight torque) or damaged cable shield (replace if resistance deviates from 7.2 ± 0.8 ohms). If readings drift, check for debris on the probe tip or excessive tip temperature. The PPS tip can withstand most industrial fluids, but prolonged contact with strong acids should be avoided. For persistent issues, verify that the overall case length option (1.0 in) matches the mounting depth requirement.