Product Overview
When physical abuse, oil leakage, and cable pull-out threaten the reliability of your vibration monitoring, the Bently Nevada 330191-00-40-20-CN delivers a rugged solution. This 3300 XL 8 mm ETR Proximity Probe is engineered with patented TipLoc and CableLoc technologies to ensure a robust bond between probe tip and body, and a 330 N (75 lbf) pull strength that secures the cable against accidental disconnection. Designed for harsh industrial environments, this probe withstands differential pressure and reduces maintenance downtime.
Technical Specifications Breakdown
Key performance parameters of the Bently Nevada 330191-00-40-20-CN are detailed below. Every specification originates from the OEM datasheet to guarantee accuracy.
| Parameter |
Value |
| Power Supply (nonincendive) |
-17.5 Vdc to -26 Vdc at 12 mA max consumption |
| Supply Sensitivity |
Less than 2 mV change in output voltage per volt change in input voltage |
| Output Resistance |
50 Ω |
| Probe DC Resistance (2.0 m) |
7.88 ± 0.50 Ω |
| Tensile Strength (probe case to lead) |
330 N (75 lbf) |
| Tensile Strength (lead to extension connector) |
270 N (60 lbf) |
| 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) |
| Temperature Range (T1) |
-55°C to +232°C (probe only, EPL Ga/Gc) |
Industry Applications
The Bently Nevada 330191-00-40-20-CN excels in rotating machinery monitoring—such as steam turbines, compressors, and large pumps—where physical robustness is critical. Its 8 mm diameter probe tip uses thicker PPS encapsulation for added durability, making it ideal for high-vibration zones. The optional FluidLoc cable option prevents oil leakage from machines, extending probe life in lubricated environments. For example, in a refinery compressor train, this probe reduces false alarms from cable wear and liquid ingress, directly improving uptime.
Installation & Setup Guidance
Proper mounting of the Bently Nevada 330191-00-40-20-CN ensures accurate readings. Use the 3/8-24 UNF thread with a maximum engagement of 0.563 in. Apply the Viton® O-ring seal to prevent differential pressure leakage. Tighten connectors to 0.565 N•m (5 in•lbf) using a torque wrench—over-torquing can damage gold-plated contacts. For the 2.0 m total length (6.6 ft) without armor, route the 75 Ω triaxial FEP cable away from sharp edges. When using barriers, ensure supply voltage is between -23 Vdc and -26 Vdc to maintain linear range.
Maintenance & Reliability
The Bently Nevada 330191-00-40-20-CN requires minimal routine care. Inspect the PPS probe tip for cracks after 12-month intervals. Monitor the cable for FEP jacket abrasion in high-temperature zones (up to 232°C for T1 classification). The patented CableLoc design provides 330 N pull strength, but avoid sharp bends near the connector. For maximum reliability, always pair with BN extension cables and BN Prox to meet entity parameters.
Selection Guide & Purchasing Advice
Before ordering, verify your system requirements: the Bently Nevada 330191-00-40-20-CN is specifically the 3300 XL 8 mm ETR probe with unthreaded length 0.0 in, overall case length 4.0 in, total probe length 2.0 m, and CN country-specific approval. It does not include armor; if needed, order the optional flexible AISI 302/304 SST armor. For a reliable source of genuine parts, PLC Source PRO offers this module new and in factory packing with a 12-month warranty.