Product Overview
The Bently Nevada 330191-00-40-15-CN is a 3300 XL 8 mm ETR proximity probe designed for reliable shaft vibration and position measurement in industrial rotating machinery. Featuring a 3/8-24 UNF thread, 0.0 in unthreaded length, 4.0 in overall case length, and 1.5 meter total length, this probe incorporates patented TipLoc and CableLoc technologies to enhance mechanical robustness. The CableLoc design delivers 330 N (75 lbf) pull strength, ensuring secure cable attachment and long‑term stability. This probe is ideal for upgrading older Bently Nevada models or replacing worn probes in critical applications.
Technical Specifications
| Parameter |
Value |
| Model |
330191 - 3300 XL 8 mm ETR Probe, 3/8-24 UNF thread, without armor |
| Unthreaded Length Option |
00 - 0.0 in |
| Overall Case Length Option |
40 - 4.0 in |
| Total Length Option |
15 = 1.5 meter (4.9 feet) |
| Power Supply |
Requires -17.5 Vdc to -26 Vdc (nonincendive) at 12 mA max; -23 Vdc to -26 Vdc with barriers |
| Output Resistance |
50 Ω |
| Probe DC Resistance (at 1.5 m) |
7.73 ± 0.50 Ω |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 303 or 304 stainless steel |
| Standard Cable |
75 Ω triaxial, FEP insulated, lengths: 0.5, 1, 1.5, 2, 3, 5, 9 m |
| Extended Temp Range Cable |
75 Ω triaxial, PFA insulated, lengths: 0.5, 1, 1.5, 2, 5, 9 m |
| Optional Armor |
Flexible AISI 302 or 304 SST with FEP outer jacket |
| Maximum Tensile Strength |
330 N (75 lbf) probe case to lead; 270 N (60 lbf) at connector |
| Connector Material |
Gold‑plated brass or beryllium copper |
| Maximum Connector Torque |
0.565 N·m (5 in·lbf) |
| Probe Case Thread |
3/8-24 UNF; max thread engagement 0.563 in |
| Weight |
323 g/m (11.4 oz/m) |
| Temperature Rating (Ambient, Probe Only) |
EPL Ga/Gc: T1 to T5 (-55°C to +232°C max) |
Industry Applications
The Bently Nevada 330191-00-40-15-CN is engineered for demanding environments such as steam turbines, compressors, pumps, and large electric motors. In a typical steam turbine upgrade scenario, replacing older probes with this 3300 XL model provides improved immunity to physical abuse thanks to thicker PPS coil encapsulation and larger case diameter. The FluidLoc cable option (available separately) prevents oil leaks through the cable interior, making it ideal for lubricated machinery applications.
Installation & Setup Guidance
When installing the Bently Nevada 330191-00-40-15-CN, ensure the mounting surface is clean and that the 3/8-24 UNF thread engagement does not exceed 0.563 in to avoid damaging the probe body. Use the gold‑plated connectors with a torque of 0.565 N·m (5 in·lbf) to secure extension cables. For one‑meter systems, no extension cable is needed; for longer runs, use BN extension cables rated for 75Ω triaxial. Ensure the nonincendive circuit is connected per drawing 140979, with power supplied between -17.5 Vdc and -26 Vdc.
Maintenance & Reliability
The probe’s Viton® O‑ring provides a differential pressure seal between tip and case, but probes are not pressure tested before shipment. Inspect the O‑ring regularly in environments with high temperature cycling (up to +232°C for T1 classification). The PPS tip and stainless steel case resist corrosion in most industrial atmospheres. For extended life, avoid operating at supply voltages more positive than -23.5 Vdc, as this reduces linear range. Use FluidLoc cables when fluids are present to extend cable service life.
Selection Guide & Purchasing Advice
Before purchasing the Bently Nevada 330191-00-40-15-CN, verify the total length required (this unit is 1.5 m) and confirm that your system uses 3/8-24 UNF mounting threads. If you need armor or an extended temperature cable, order the optional configurations separately. For genuine, new and original factory‑packed units with a 12‑month warranty, trust PLC Source PRO as your reliable supplier. All items are inspected before shipping to ensure compliance with OEM specifications.