Problem: Vibration Monitoring Downtime Drains Your Budget
When a proximity probe fails on a turbine or compressor, every hour of unplanned downtime costs thousands. The Bently Nevada 146054-08-05-00-05 solves this with a ready-to-ship 3300 Ceramic Capped Proximity Probe built for critical machinery protection. This 0.5-meter probe with 3/8-24 UNF thread and no connector delivers reliable radial vibration and position measurement for oil, gas, and industrial automation systems.
What Makes This Probe a Practical Choice
Ceramic Tip That Lasts
The alumina ceramic (Al2O3) probe tip resists wear and impact far better than standard plastic tips. In harsh turbine environments, this means fewer replacements and longer calibration intervals.
Stainless Steel Body
An AISI 304 stainless steel case handles corrosive offshore and refinery atmospheres. The 3/8-24 thread engages up to 0.563 in, ensuring a secure mount on bearing housings.
Wide Temperature Range
Operating from -51°C to +177°C (-60°F to +351°F), this probe works in extreme climates from arctic pipelines to desert compressor stations.
Pressure Sealing
Rated to seal 34 Bar (500 psi) nitrogen, the probe suits high-pressure applications without additional barriers.
Key Specifications at a Glance
| Parameter | Value |
|---|---|
| Model | 3300 Ceramic Capped Proximity Probe |
| Part Number | 146054-08-05-00-05 |
| Overall Case Length | 0.8 in |
| Total Length | 0.5 m (1.6 ft) |
| Connector | No connector |
| Agency Approval | CSA, ATEX, IECEx |
| Probe Case Thread | 3/8-24 UNF |
| Max Thread Engagement | 0.563 in |
| Nominal DC Resistance | 7.45 ± 0.50 ohms |
| Linear Range | 1.52 mm (60 mils) |
| Incremental Scale Factor | 7.87 V/mm (200 mV/mil) ±6.5% |
| Probe Tip Material | Alumina ceramic (Al2O3) |
| Probe Case Material | AISI 304 stainless steel |
| Cable Type | 75 Ω coaxial, FEP insulated |
| Operating Temperature | -51°C to +177°C |
| Pressure Rating | 34 Bar (500 psi) |
Where the 146054-08-05-00-05 Delivers
Turbine Overspeed Protection
On steam turbines, this probe feeds radial vibration data to a 3300 monitoring system. The 1.52 mm linear range and 7.87 V/mm scale factor give operators precise shaft position readings for overspeed trip logic.
Compressor Surge Detection
In natural gas compressors, the ceramic tip withstands high-pressure gas and minor impacts. The 34 Bar pressure seal means no extra housing is needed, saving installation time and cost.
Pump Cavitation Monitoring
For API 610 pumps, the 0.5-meter cable length fits tight bearing housings. The CSA, ATEX, and IECEx approvals allow use in hazardous areas without additional certification delays.
Installation and Setup That Saves Time
Mounting this probe requires a 3/8-24 UNF tapped hole. Thread engagement up to 0.563 in ensures stability. Because there is no connector, you will need to route the 75 Ω coaxial cable directly to your Proximitor sensor or extension cable. Keep cable runs away from high-voltage sources to avoid signal noise. The FEP insulation resists oil and chemicals common in industrial settings.
For hazardous areas, verify that the temperature classification matches your process. The probe carries T1 through T5 ratings for EPL Ga and Gc, and T280°C through T90°C for EPL Dc. Always follow local installation codes.
Maintenance and Reliability That Protect Your ROI
Inspect the ceramic tip periodically for cracks or wear. A damaged tip changes the scale factor and can cause false vibration alarms. Because the probe has no moving parts, maintenance is minimal. However, the cable is the most vulnerable point — check for abrasion or kinks during scheduled shutdowns.
With a 12-month factory warranty and new original factory packing, you avoid the risks of refurbished or counterfeit probes. Oil AutoTech stocks this model for fast dispatch, worldwide, so you get spares when you need them.
Compatibility and Integration
The 146054-08-05-00-05 works with Bently Nevada 3300 5 mm systems, including Proximitor sensors and extension cables. The 75 Ω coaxial cable matches standard system impedance. If you are wiring into a fieldbus network such as PROFINET or EtherNet/IP, you may need an external gateway or connection module. Confirm cables and gateways with your supplier before ordering.
Selection Guide: What to Verify Before Buying
Check your system voltage: this probe is designed for -24 Vdc power supply with a 10 kW load. Confirm the target material — performance specifications apply to AISI 4140 steel targets. If your target is different, system accuracy may vary. The 0.5-meter total length suits short runs; for longer distances, consider other length options in the 3300 series.
Oil AutoTech provides hands-on technical selection help. Contact Oil AutoTech today for pricing and availability.
Frequently Asked Questions
What is the part number 146054-08-05-00-05 used for?
It is a Bently Nevada 3300 Ceramic Capped Proximity Probe with 0.5 m length, no connector, and CSA, ATEX, IECEx approvals. It measures radial vibration and position on rotating machinery.
Does this probe come with a connector?
No. The -00 option means no connector. You must route the 75 Ω coaxial cable directly to your Proximitor sensor or extension cable.
What is the pressure rating of this probe?
The probe is rated to seal 34 Bar (500 psi) nitrogen. For higher pressures, contact Bently Nevada’s custom design department.
Is this probe approved for hazardous areas?
Yes. It carries CSA, ATEX, and IECEx approvals. The temperature classification depends on your process temperature — verify the T-rating for your application.
What is the linear range of the 146054-08-05-00-05?
The linear range is 1.52 mm (60 mils), starting approximately 0.25 mm (10 mils) from the target and extending to 1.78 mm (70 mils).
