Product Overview
Downtime on a turbine or compressor train rarely waits for a purchase order. The Bently Nevada 146055-10-02-00 is a 3300 Ceramic Capped Reverse Mount Probe built for exactly that reality: a 1.0 metre probe with a 3/8-24 UNF case thread, supplied new and original in factory packing. It belongs to the 3300 5 mm system family, where the probe works alongside a Proximitor Sensor and extension cable to measure shaft displacement and vibration.
This is the reverse mount variant, so the probe body sits behind the mounting surface with the ceramic tip facing the target. That layout suits machine casings where access from the front is limited.
Key Parameters at a Glance
Thread and Mounting
The probe case uses a 3/8-24 UNF thread. Maximum length of thread engagement is 0.563 in, which tells a fitter how deep the case can seat before the tip position changes.
Electrical Behaviour
At the 1.0 m length, nominal DC resistance from the centre conductor to the outer conductor is 7.59 ± 0.50 ohms. The linear range is 1.52 mm (60 mils), beginning roughly 0.25 mm (10 mils) from the target and running to 1.78 mm (10 to 70 mils), approximately –4 to –16 Vdc.
Materials and Environment
The probe tip is alumina ceramic (Al2O3) and the case is AISI 304 stainless steel. Operating and storage temperature spans -51°C to +177°C (-60°F to +351°F). The probe seals against 34 Bar (500 psi) nitrogen.
Where This Probe Fits
Oil and gas operators use 3300 probes on steam turbines, centrifugal compressors and large motors, where shaft movement must be tracked continuously. A refinery maintenance team replacing a damaged probe during a planned outage benefits from the 1.0 m cable length, which reaches junction boxes without splicing. Power generation sites running continuous duty often keep a spare on the shelf; fast dispatch, worldwide matters when the next outage window is fixed.
Buying Checklist
Before ordering, confirm four things: the case thread matches your mounting boss (3/8-24 UNF), the total length suits your cable route (1.0 m here), the connector type fits your extension cable, and the agency approval option matches site requirements. On this unit, agency approval is not required, and the connector is a miniature ClickLoc coaxial type with standard cable.
If your target material differs from AISI 4140 steel, system accuracy and interchangeability figures will not apply as published. Ask for hands-on technical selection help before committing.
Integration Notes
This probe is part of a 3300 5 mm system and performs as specified only when paired with 3300 XL components — Proximitor Sensor, extension cable and probe together. Mixing series or third-party parts can shift the scale factor. When wiring into plant networks, confirm cables and any gateway or connection module with your supplier first.
Please verify current lifecycle status and availability with Oil AutoTech before ordering. Contact Oil AutoTech today for pricing and availability.
