Bently Nevada 330105-02-12-20-02-05 Probe

3300 XL 8mm Reverse Mount Proximity Probe

Product Introduction

The 330105-02-12-20-02-05 represents a specific factory-configured variant within the Bently Nevada 3300 XL 8 mm probe family. This reverse mount probe is engineered for non-contact measurement of shaft vibration and axial position on critical rotating machinery. Its 3/8-24 UNF thread and reverse mounting design allow the probe to be threaded into internally threaded sleeves, which protects the cable and supports the probe at the required monitoring location. The 2.0-meter total length and miniature ClickLoc coaxial connector make it a drop-in component for standard 3300 XL transducer systems.

Technical Specifications

The 330105-02-12-20-02-05 operates as a passive eddy-current sensor. It requires pairing with a compatible 3300 XL Proximitor sensor to generate the standard system output of approximately -200 mV/mil (7.87 mV/µm).

Specifically, the probe's nominal DC resistance from the center conductor to the outer conductor is 7.88 Ω ± 0.50 Ω for the 2.0-meter length variant. The probe tip is constructed from polyphenylene sulfide (PPS). Meanwhile, the probe case uses AISI 303 or 304 stainless steel for durability in industrial environments. The standard cable is a 75 Ω triaxial design with fluoroethylene propylene (FEP) insulation.

Mechanical and Environmental Parameters

The probe features a 3/8-24 UNF thread with a maximum thread engagement length of 0.563 inches. Additionally, the maximum rated tensile strength is 330 N (75 lbf) from the probe case to the probe lead. The connector utilizes gold-plated brass or gold-plated beryllium copper contacts to ensure stable signal transmission.

Furthermore, the standard operating temperature range for this probe is -52°C to +177°C (-62°F to +350°F). However, users should avoid exposing the probe to temperatures below -34°C (-30°F), as this may cause premature failure of the internal pressure seal. The probe also demonstrates excellent humidity stability, with less than a 3% change in Average Scale Factor when tested at 93% relative humidity for up to 56 days.

Installation Guide

First, verify the target material and establish the correct gap voltage using a compatible 3300 XL Proximitor. Next, thread the probe cable-end first into the mounting sleeve until it contacts the target surface, then back it off to the desired gap. The reverse mount design simplifies this process because the hexagonal nut is integral to the case. Route the ClickLoc connector to the extension cable and hand-tighten the coupling. Finally, secure the cable routing away from high-voltage lines or variable frequency drives to minimize electrical noise.

Packaging List

• 1x Bently Nevada 330105-02-12-20-02-05 Proximity Probe

• 1x Protective Capsule (Pre-installed)

• Shipping via Fedex, UPS, DHL

FAQ

Q1: What is the function of the "20" in the model code?
A: The "20" indicates the total length option. In this configuration, the probe cable measures 2.0 meters (6.6 feet).

Q2: Can this probe be used in hazardous areas?
A: Yes. The "05" suffix on this 330105-02-12-20-02-05 signifies that it carries multiple agency approvals, including CSA, ATEX, and IECEx certifications for use in classified locations.

Q3: Does the reverse mount design require a special adapter?
A: No special adapter is needed. It threads directly into standard internally threaded probe sleeves designed for 3/8-24 UNF reverse mount probes.

Q4: Is the ClickLoc connector compatible with older 3300 series extension cables?
A: The miniature ClickLoc coaxial connector is the standard interface for the 3300 XL series. It provides secure, gold-plated contact and is fully interchangeable with standard 3300 XL extension cables.

Q5: What is the recommended storage temperature for this probe?
A: Store the probe within the operating range of -52°C to +177°C. Avoid prolonged exposure to temperatures below -34°C to prevent damage to the Viton O-ring seal.