Product Overview
When monitoring critical rotating machinery, signal integrity is paramount. The Bently Nevada 330709-000-230-50-01-00 3300 XL 11 mm Proximity Probe delivers reliable eddy-current sensing for vibration and position measurement. Designed for use with a five-meter Proximitor Sensor, this probe reduces the risk of signal degradation caused by cable length mismatch.
Technical Specifications
Key parameters for the Bently Nevada 330709-000-230-50-01-00 include a 5.0 meter total probe length, M16x1.5 thread, and a 230 mm overall case length. The probe offers a dc resistance of 7.2 ± 0.8 ohms and uses a 75 ohm triaxial, FEP-insulated cable.
| Parameter |
Value |
| Probe Length |
5.0 m |
| Thread |
M16 x 1.5 |
| Overall Case Length |
230 mm |
| Unthreaded Length |
0 mm |
| Probe DC Resistance |
7.2 ± 0.8 ohms |
| Connector |
Miniature coaxial ClickLoc with protector |
| Cable Specification |
75 ohm triaxial, FEP insulated |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Operating Temperature Range |
-52°C to +177°C |
| Probe Case Torque (Recommended) |
21.1 N·m |
| Minimum Bend Radius |
25.4 mm |
Failure Mode Analysis & Prevention
Common failures in proximity probes arise from cross-talk, temperature extremes, and incorrect cable lengths. The Bently Nevada 330709-000-230-50-01-00 mitigates cross-talk with a recommended target size of at least 30.5 mm diameter and shaft diameter of 152 mm. Its wide temperature range from -52°C to +177°C prevents premature seal failure when exposure below -34°C is avoided. The 5.0 meter cable length is specifically matched to the Proximitor Sensor, eliminating impedance mismatches that can cause erroneous readings.
Industry Applications
In turbomachinery, compressors, and large pumps, the Bently Nevada 330709-000-230-50-01-00 provides accurate shaft vibration and position data. Its robust stainless steel case and PPS tip resist harsh environments. For example, in steam turbines, the probe’s temperature schedule ensures reliable operation even under high ambient temperatures—up to +232°C for certain temperature classifications.
Installation Guidance
Proper installation ensures longevity. Use the recommended torque of 21.1 N·m for the M16x1.5 probe case. The connector-to-connector torque should be only finger tight, maximum 0.565 N·m. Avoid bending the cable below a 25.4 mm radius. Thread engagement should not exceed 24 mm to avoid damage. The probe can be used with or without stainless steel armor.
Maintenance & Reliability
Routine inspection should focus on cable integrity and connector cleanliness. The probe’s 304 SST case resists corrosion, and the FEP cable insulation withstands chemical exposure. Avoid exposing the probe to temperatures below -34°C to preserve the pressure seal. The temperature classifications (T1–T5) guide maximum ambient temperatures for hazardous locations. Following these limits extends service life and reduces unplanned downtime.
Selection Guide
When selecting the Bently Nevada 330709-000-230-50-01-00, verify the Proximitor Sensor is rated for a 5.0 meter cable. This probe is not interchangeable with 1-meter or 9-meter systems. For procurement, trust UBEST Automation (ubest101) for genuine parts and technical support.