When a Turbine’s Vibration Signal Goes Quiet
A compressor train trips without warning. The vibration monitor shows a dead channel. The cause is often a failed probe tip in a harsh, abrasive environment. The Bently Nevada 146054-08-50-01-05 solves this problem with a ceramic capped 3300 probe built for reliable, long-term displacement measurement.
This is a 3300 Series ceramic capped proximity probe. It uses a 3/8-24 UNF thread and comes without armor. The alumina ceramic (Al2O3) tip resists wear and impact. The AISI 304 stainless steel case handles tough industrial conditions. This probe is ready-to-ship for oil, gas, and industrial automation applications.
Key Parameters That Matter
Linear Range and Sensitivity
The probe offers a 1.52 mm (60 mils) linear range. It starts at about 0.25 mm (10 mils) from the target and runs to 1.78 mm (10 to 70 mils). The output is approximately -4 to -16 Vdc. The Incremental Scale Factor (ISF) is 7.87 V/mm (200 mV/mil) ±6.5%. This includes interchangeability error when measured in 0.25 mm (10 mil) increments over the 60 mil range from 0°C to +45°C. This accuracy supports precise radial vibration and axial position measurements.
Environmental and Mechanical Ratings
The probe operates and stores from -51°C to +177°C (-60°F to +351°F). It is pressure rated to seal 34 Bar (500 psi) nitrogen. The ceramic tip and stainless steel case resist corrosion and abrasion. The 5.0 meter (16.4 feet) total length matches 5 m Proximitor Sensor systems only.
Electrical and Connection Details
The probe’s nominal DC resistance is 8.73 ± 0.70 ohms from center conductor to outer conductor. It uses a miniature coaxial ClickLoc connector with connector protector and standard cable. The cable is 75 Ω coaxial, FEP insulated. This configuration ensures stable signal transmission in noisy plant environments.
Where This Probe Delivers
In oil and gas, this probe monitors centrifugal compressor shaft vibration. The ceramic cap stands up to process gas contaminants. In power generation, it tracks steam turbine axial position. The 34 Bar pressure seal suits high-pressure steam applications. In industrial automation, it provides reliable position feedback on large rotating equipment. The 146054-08-50-01-05 is a practical replacement for aging 3300 system probes.
Installation and Integration Notes
Mount the probe using the 3/8-24 UNF thread. Maximum thread engagement is 0.563 in. Keep the target within the linear range. Use only 3300 XL components for specified accuracy. The system requires a -24 Vdc power supply and a 10 kΩ load. When wiring into fieldbus networks, you may need an external gateway or connection module. Confirm cables and gateways with your supplier. For hands-on technical selection help, contact Oil AutoTech.
Reliability and Maintenance
Inspect the probe tip periodically for wear or damage. Check the connector and cable for abrasion. The ceramic tip resists wear better than standard probes. This reduces downtime and replacement costs. Keep spare probes on hand for critical machinery. Fast dispatch, worldwide means you get spares when you need them.
Specifications Summary
| Parameter | Value |
|---|---|
| Model | 3300 Ceramic Capped Proximity Probe |
| Part Number | 146054-08-50-01-05 |
| Thread | 3/8-24 UNF |
| Overall Case Length | 0.8 in |
| Total Length | 5.0 m (16.4 ft) |
| Connector | Miniature coaxial ClickLoc with protector |
| Agency Approval | CSA, ATEX, IECEx |
| Linear Range | 1.52 mm (60 mils) |
| ISF | 7.87 V/mm (200 mV/mil) ±6.5% |
| Probe Tip Material | Alumina ceramic (Al2O3) |
| Case Material | AISI 304 stainless steel |
| Operating Temperature | -51°C to +177°C |
| Pressure Rating | 34 Bar (500 psi) |
| Nominal DC Resistance | 8.73 ± 0.70 ohms |
FAQs
What is the 146054-08-50-01-05 used for?
It measures radial vibration and axial position on rotating machinery in oil, gas, and industrial applications.
What is the total length of this probe?
The total length is 5.0 meters (16.4 feet). It works with 5 m Proximitor Sensor systems only.
What agency approvals does this probe have?
It carries CSA, ATEX, and IECEx approvals.
What is the maximum thread engagement?
The maximum thread engagement is 0.563 in with a 3/8-24 UNF thread.
What is the pressure rating?
The probe seals to 34 Bar (500 psi) nitrogen. Higher-pressure modifications are available.
Contact Oil AutoTech today for pricing and availability.
