330105-02-12-05-12-05 Reverse Mount Probe Bently Nevada

330105-02-12-05-12-05 Reverse Mount Probe

Product Introduction

The 330105-02-12-05-12-05 belongs to Bently Nevada's industry-standard 3300 XL series. This 8 mm reverse mount probe is specifically engineered for shaft vibration and axial position monitoring in critical rotating machinery. What sets this particular model apart is its comprehensive hazardous area approval package, including CSA, ATEX, and IECEx certifications. Consequently, it is an excellent choice for applications in oil refineries, chemical plants, and other explosive environments.

This model features a 3/8-24 UNF thread and a total length of 0.5 meter. The connector option "12" indicates the presence of the Miniature ClickLoc connector with FluidLoc cable technology. Nevertheless, the FluidLoc option is not necessary for the vast majority of 3300 XL installations due to the built-in probe sleeve. Therefore, we recommend carefully evaluating your specific application requirements before selecting this option.

Technical Specifications

The probe's electrical characteristics ensure precise and repeatable measurements. The nominal DC resistance from the center conductor to the outer conductor (RPROBE) measures 7.45 ± 0.50 Ω for this 0.5-meter length. This tight tolerance specification guarantees consistent signal transmission to the proximitor and monitoring system, which is essential for reliable machine protection.

The probe tip is manufactured from Polyphenylene sulfide (PPS) , a high-performance thermoplastic known for its excellent chemical resistance and dimensional stability across a wide temperature range. Meanwhile, the probe case is constructed from AISI 303 or 304 stainless steel (SST) , providing outstanding protection against corrosion and mechanical damage. The 75Ω triaxial cable uses fluoroethylene propylene (FEP) insulation for the standard version, offering good flexibility and thermal resistance. All connectors feature gold-plated brass or beryllium copper contacts for secure, low-resistance connections.

Mechanical and Environmental Parameters

Understanding the mechanical limits is crucial for proper installation and long service life. The probe case uses a 3/8-24 UNF thread with a maximum thread engagement of 0.563 inches. The tensile strength ratings are 330 N (75 lbf) from the probe case to the probe lead and 270 N (60 lbf) at the connector junction. The probe weighs approximately 323 g/m (11.4 oz), giving you a clear reference for handling and installation planning.

Regarding environmental resilience, the standard probe operates reliably between -52°C and +177°C (-62°F to +350°F) . For higher temperature applications, an extended range version is available that supports tip temperatures up to +218°C (+425°F) and cable temperatures up to +260°C (+500°F). However, sustained exposure to temperatures below –34°C (–30°F) may cause premature failure of the pressure seal, so we advise caution in extremely cold environments. Additionally, the probe exhibits less than a 3% change in Average Scale Factor (ASF) after 56 days at 93% relative humidity per IEC standard 68-2-3.

Hazardous Area Approvals

One of the standout features of the 330105-02-12-05-12-05 is its comprehensive certification package. The "05" agency approval option signifies compliance with CSA, ATEX, and IECEx standards. These certifications make this probe suitable for installation in potentially explosive atmospheres where flammable gases, vapors, or dust may be present. Specifically, these approvals cover the probe and its associated cable assembly, ensuring the entire transducer system meets rigorous safety requirements.

Installation and Mounting Guide

Proper installation of the 330105-02-12-05-12-05 ensures accurate readings and maximizes service life. First, thoroughly clean the mounting hole and the probe threads to remove any debris or contaminants. Next, carefully thread the probe into the housing using the 3/8-24 UNF thread. Remember that the maximum engagement is 0.563 inches; over-tightening can damage the threads or internal components. For optimal performance, pair this probe with a Bently Nevada extension cable and proximitor that match the impedance and length specifications.

Additionally, the 3300 XL 8 mm probes are designed to seal differential pressure between the tip and case using a Viton® O-ring. While these probes are not pressure-tested prior to shipment, we can arrange a pressure seal test for your specific application upon request. Finally, route the cable carefully to avoid sharp bends, kinks, and excessive strain. Although the FEP insulation provides good flexibility, we suggest considering the optional flexible stainless steel armor in high-abrasion or high-traffic areas.

Packaging List

Your shipment for the Bently Nevada 330105-02-12-05-12-05 includes:

• 1 x 3300 XL 8 mm Reverse Mount Probe (0.5m FEP cable)

• 1 x Miniature ClickLoc FluidLoc coaxial connector (attached)

• Installation and mounting instruction sheet

Frequently Asked Questions (FAQ)

1. What does the FluidLoc cable option provide?
The FluidLoc cable option (indicated by the -12 connector code) offers additional sealing against fluid ingress along the cable. However, for most 330105 installations, the probe sleeve provides sufficient protection, so this option is rarely necessary.

2. What hazardous area approvals does this model carry?
The 330105-02-12-05-12-05 carries CSA, ATEX, and IECEx approvals, making it suitable for installation in potentially explosive atmospheres. Always verify that the certification matches your specific zone requirements.

3. Can I use this probe at temperatures above 177°C?
The standard probe operates up to +177°C. For higher temperatures, we recommend selecting an extended temperature range version with PFA cable insulation, which supports tip temperatures up to +218°C.

4. What is the recommended torque for installation?
The mechanical data recommends a maximum torque of 22.6 N•m (200 in•lb) and a recommended torque of 7.5 N•m (66 in•lb) for reverse mount probes. Always use a calibrated torque wrench to prevent damage.

5. What shipping methods are available for this item?
We ship all orders via FedEx, UPS, or DHL, depending on your location and preference. All packages are fully insured and tracked for your convenience.