Product Overview
When a turbine or compressor goes down, every hour of downtime costs money. The Bently Nevada 146054-08-20-01-00 is a 3300 ceramic capped proximity probe built to keep rotating machinery under continuous, reliable measurement. As part of the trusted 3300 series, this probe pairs a rugged ceramic tip with a stainless steel case, making it a practical choice for harsh oil, gas and industrial automation environments. If you need spares when you need them, this probe is ready-to-ship.
Key Parameters
This probe uses a 3/8-24 UNF thread and a 0.8 in overall case length. The total length is 2.0 meters (6.6 feet), and it comes with a miniature coaxial ClickLoc connector with connector protector and standard cable. The probe case thread is 3/8-24, with a maximum thread engagement of 0.563 in. Nominal DC resistance from the center conductor to the outer conductor is 7.88 ± 0.50 ohms. The probe tip is made of alumina ceramic (Al2O3), and the case is AISI 304 stainless steel. The standard cable is 75 Ω coaxial, FEP insulated, available in total probe lengths of 0.5, 1, 2, 5, or 9 meters. Operating and storage temperature range is -51°C to +177°C (-60°F to +351°F), and the probe is pressure rated to seal 34 Bar (500 psi) nitrogen.
Performance You Can Count On
The 3300 system delivers a linear range of 1.52 mm (60 mils), starting at approximately 0.25 mm (10 mils) from the target and extending to 1.78 mm (70 mils), corresponding to approximately –4 to –16 Vdc. The Incremental Scale Factor (ISF) is 7.87 V/mm (200 mV/mil) ±6.5% including interchangeability error, measured in increments of 0.25 mm (10 mils) over the 60 mil linear range from 0°C to +45°C. These specifications apply to a 3300 5 mm system with Proximitor Sensor, extension cable and probe, under a -24 Vdc power supply, a 10 kW load, and an AISI 4140 steel target. For accurate results, use only 3300 XL components.
Where It Fits
This probe suits oil and gas applications where vibration and position monitoring are critical. Use it on steam turbines, centrifugal compressors, and large motors to detect shaft displacement and protect against catastrophic failure. In industrial automation, it integrates with machinery protection systems for continuous condition monitoring. The ceramic cap resists wear and extends service life in abrasive environments, while the stainless steel case handles corrosive atmospheres. When you need fast dispatch, worldwide, Oil AutoTech can help you select the right probe for your system.
Buyer’s Guide
Before ordering, verify your system compatibility: this probe is part of the 3300 series and requires a compatible Proximitor Sensor and extension cable. Check the thread size (3/8-24 UNF) matches your mounting point, and confirm the total length (2.0 meters) suits your installation distance. The ClickLoc connector provides secure, tool-free connection. If you need a different length or connector, other options exist in the 3300 series. For hands-on technical selection help, contact Oil AutoTech today for pricing and availability.
Maintenance & Reliability
Inspect the probe periodically for physical damage, especially the ceramic tip. Keep the connector clean and dry. Avoid excessive bending of the cable, which can damage the shield. The operating temperature range supports high-temperature applications up to +177°C. With proper care, this probe delivers long-term reliability, reducing unplanned downtime and protecting your ROI.
