Product Overview
When turbomachinery vibration goes undetected, catastrophic failure risks escalate. The Bently Nevada 330172-00-12-50-01-CN 5mm proximity probe with armor provides reliable, continuous shaft displacement measurement. Designed for the 3300 series, this probe uses a 1/4-28 UNF thread and polyphenylene sulfide (PPS) tip for robust performance in harsh environments. The built-in armor protects the cable against abrasion and mechanical damage, extending service life in demanding industrial settings.
Technical Specifications
Every parameter of the 330172-00-12-50-01-CN is engineered for precision. Below are key specifications derived from the original datasheet.
| Parameter |
Value |
| Total Length |
5.0 metres (16.4 feet) |
| Unthreaded Length |
0 in |
| Overall Case Length |
1.2 in |
| Connector Option |
Miniature coaxial ClickLoc with connector protector |
| Agency Approval |
CN (country specific) |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Probe Case Thread |
1/4-28 UNF |
| Max Thread Engagement |
0.375 in |
| Weight |
0.323 Kg |
| Power Supply |
−17.5 Vdc to −26 Vdc at 12 mA max |
| Output Resistance |
50 W |
| Probe DC Resistance (5m) |
8.73 ± 0.70 Ω |
| Probe Temperature Range |
−35°C to +177°C |
| Minimum Cable Bend Radius |
25.4 mm (1.0 in) |
| Probe Case Torque (max) |
7.3 N·m (65 in·lb) |
| Connector-to-Connector Torque (max) |
0.565 N·m (0.42 ft·lbf) |
| Tensile Strength (probe case to lead) |
222 N (50 lbf) |
Applications & Failure Mode Prevention
The 330172-00-12-50-01-CN excels in radial vibration and axial position monitoring of rotating equipment such as compressors, steam turbines, and fans. Its armored cable reduces the risk of signal interruption from abrasion, a common failure point in standard probes. The robust PPS tip withstands high temperatures up to +177°C, preventing thermal degradation that can cause false readings. Additionally, the miniature coaxial ClickLoc connector ensures a secure, low-noise connection, minimizing electromagnetic interference effects even in high magnetic fields up to 300 Gauss. By addressing these failure modes, the Bently Nevada 330172-00-12-50-01-CN delivers reliable data for predictive maintenance programs.
Installation & Setup Guidance
Mount the probe in a tapped hole using the 1/4-28 UNF thread. For proper thread engagement, use a #3 or larger tap drill. The maximum thread engagement is 0.375 in. When mounting, ensure the probe gap is set to 1.27 mm (50 mils) under standard conditions (AISI 4140 steel target, −24 Vdc supply, 10 kW load). The ClickLoc connector mates with standard extension cables; torque the connector to maximum 0.565 N·m (0.42 ft·lbf). Maintain a minimum cable bend radius of 25.4 mm (1.0 in) to avoid damaging the FEP-insulated coaxial cable.
Maintenance & Reliability
Inspect the probe cable and armor periodically for cuts or wear. Verify the connector torque remains within specification. Avoid exposing the probe to temperatures below −34°C (−30°F) as this may cause premature seal failure. The 330172-00-12-50-01-CN is designed for long service intervals when operated within its rated temperature range (−35°C to +177°C). Regular calibration checks with a reference target ensure consistent accuracy.
Selection Guide & Purchasing Advice
Before purchasing the Bently Nevada 330172-00-12-50-01-CN, confirm that your system requires a 5.0 m probe with armor and 1/4-28 thread. The ClickLoc connector is compatible with standard Bently Nevada extension cables. For assistance selecting the correct probe length, connector type, and agency approvals for your region, contact the experienced team at PLC Source PRO. They can verify part number details and ensure the 330172-00-12-50-01-CN meets your specific application requirements.