Bently Nevada 330105-02-12-05-02-01 3300 XL 8 mm Reverse Mount Probe

Introduction

When a critical turbine experiences unexpected vibration, the Bently Nevada 330105-02-12-05-02-01 provides the precise measurement needed to diagnose and prevent failure. This 3300 XL 8 mm reverse mount probe is engineered for reliable, continuous monitoring in demanding industrial environments.

Technical Specifications Breakdown

The 330105-02-12-05-02-01 features a 0.5 meter (1.6 feet) total probe length with a Miniature ClickLoc coaxial connector for secure signal transmission. The probe tip is made of polyphenylene sulfide (PPS), offering excellent chemical resistance and dimensional stability. The probe case is constructed from AISI 303 or 304 stainless steel (SST), ensuring durability in harsh conditions. The nominal probe DC resistance (RPROBE) from center conductor to outer conductor is 7.45 ± 0.50 ohms at 0.5 meters, providing consistent electrical performance. The probe case thread is 3/8-24 UNF with a maximum thread engagement length of 0.563 inches. The probe weighs 323 g/m (11.4 oz). Operating and storage temperature range for the standard probe is -52°C to +177°C (-62°F to +350°F).

Industry Applications

This reverse mount probe excels in vibration monitoring for rotating machinery such as steam turbines, centrifugal compressors, and large pumps. In a typical steam turbine application, the 330105-02-12-05-02-01 mounts in a confined space where its reverse configuration allows easy installation and reliable shaft displacement measurement. The PPS tip withstands high temperatures and chemical exposure, making it suitable for compressor applications with aggressive process gases.

Installation & Setup Guidance

When installing the 330105-02-12-05-02-01, ensure the probe tip is properly positioned relative to the shaft target. The 3/8-24 UNF threads allow secure mounting in standard probe holders. Use the Miniature ClickLoc connector to attach the extension cable, ensuring a firm click is heard. Verify the total cable length does not exceed the specified maximum to maintain signal integrity. The probe is designed to seal differential pressure between the tip and case using a Viton O-ring; avoid overtightening to prevent seal damage.

Maintenance & Reliability

Routine inspection of the probe cable and connector for wear or damage is recommended. The stainless steel case and FEP-insulated cable resist corrosion and moisture. The probe shows less than a 3% change in Average Scale Factor (ASF) when tested in 93% humidity per IEC standard 68-2-3 for up to 56 days, confirming its reliability in humid environments. For extended temperature range applications, the probe tip can operate up to +218°C (-62°F to +425°F) and the cable up to +260°C (-60°F to +500°F).

Selection Guide & Purchasing Advice

Before ordering the 330105-02-12-05-02-01, verify that the 0.5 meter cable length and Miniature ClickLoc connector suit your installation. Confirm the thread size (3/8-24 UNF) matches your probe holder. For applications requiring agency approvals, note that this variant has the "01 Not required" option. plcmatrix.com offers this Bently Nevada probe along with expert support to ensure you select the correct configuration for your machinery monitoring needs.