Product Overview
The Bently Nevada 330191-00-70-90-00 is a 3300 XL 8 mm ETR proximity probe designed for robust vibration and displacement monitoring in industrial rotating machinery. This model features a 3/8-24 UNF thread, an overall case length of 7 inches, and a total cable length of 9.0 meters (29.5 feet). Its patented TipLoc molding method provides a robust bond between the probe tip and body, while the CableLoc design ensures 330 N (75 lbf) pull strength to prevent cable detachment under stress. An optional FluidLoc cable option further prevents oil and liquid leakage through the cable interior, addressing common failure modes in harsh environments.
Technical Specifications
| Parameter |
Value |
| Power Supply (nonincendive) |
-17.5 Vdc to -26 Vdc |
| Power Supply (with barriers) |
-23 Vdc to -26 Vdc |
| Maximum Current Consumption |
12 mA |
| Supply Sensitivity |
<2 mV change per volt change |
| Output Resistance |
50 Ω |
| Probe DC Resistance (9.0 m length) |
9.87 ± 0.90 Ω |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 303 or 304 stainless steel |
| Standard Cable |
75Ω triaxial, FEP insulated |
| Extended Temp Cable |
75Ω triaxial, PFA insulated |
| Armor (optional) |
Flexible AISI 302/304 SST with FEP jacket |
| Maximum Tensile Strength (case to lead) |
330 N (75 lbf) |
| Maximum Tensile Strength (lead to ext cable) |
270 N (60 lbf) |
| Connector Material |
Gold-plated brass or beryllium copper |
| Maximum Connector Torque |
0.565 N•m (5 in•lbf) |
| Probe Case Thread |
3/8-24, max engagement 0.563 in |
| Probe Weight |
323 g/m (11.4 oz) |
Industry Applications
In power generation, the Bently Nevada 330191-00-70-90-00 monitors shaft vibration on turbines and generators, where the robust PPS tip and stainless steel case withstand high temperatures and physical abuse. In petrochemical plants, the probe protects compressors and pumps from unplanned downtime by detecting early bearing wear. The patent-pending FluidLoc option is ideal for applications with oil mist or liquid ingress, ensuring reliable operation even in wet environments. The 8 mm probe's thicker encapsulation provides enhanced durability, making it a preferred choice for critical rotating equipment.
Installation & Setup Guidance
When installing the Bently Nevada 330191-00-70-90-00, mount the probe securely using the 3/8-24 UNF thread with maximum thread engagement of 0.563 inches. Tighten connectors to the specified torque of 0.565 N•m (5 in•lbf) using a torque wrench to avoid damage. Use only Bently Nevada extension cables to maintain entity parameters. For systems without extension cables (1-meter systems), direct connection is acceptable. Verify that the probe tip is clean and free from debris before installation. The Viton® O-ring seals differential pressure between tip and case; do not pressure test probes prior to shipment. Ensure the probe is routed away from extreme heat sources and mechanical stress to optimize longevity.
Maintenance & Reliability
The Bently Nevada 330191-00-70-90-00 requires minimal maintenance due to its rugged construction. Periodically inspect the cable and connectors for signs of wear or corrosion. The gold-plated connectors resist oxidation but should remain clean. Check the probe tip for physical damage or debris accumulation, especially in dirty environments. The temperature schedule indicates the probe can operate from -55°C to +232°C for T1 classification, making it suitable for extreme conditions. Adherence to torque limits during installation prevents connector fatigue. By addressing common failure points such as cable pull‑out and fluid ingress, this probe reduces total cost of ownership through extended service intervals.
Selection Guide & Purchasing Advice
Before purchasing the Bently Nevada 330191-00-70-90-00, verify your system's cable length requirement and environmental classification. This model is supplied new in original factory packing with a 12-month warranty from PLC Source PRO. Ensure compatibility with your Bently Nevada monitor or proximity system. If your application involves high temperatures, the extended temperature range cable (PFA insulated) is recommended. For additional protection against liquid ingress, select the FluidLoc option when ordering. PLC Source PRO stocks genuine parts and provides expert support to help you choose the correct probe configuration.