330105-05-30-10-02-05 Bently Nevada 3300 XL 8mm Reverse Mount Probe

Product Overview

The 330105-05-30-10-02-05 3300 XL 8 mm Reverse Mount Probe serves as a high-precision displacement sensor designed specifically for applications where traditional probe mounting is inaccessible. Unlike standard probes, the reverse mount design allows technicians to install the probe from the outside of the machine housing through a threaded port, making it indispensable for monitoring internal clearances, radial vibration, and axial thrust in gearboxes and pumps.

By utilizing eddy current technology, this sensor delivers a linear voltage output proportional to the distance between the probe tip and the target shaft. The 3300 XL series provides a significant upgrade in performance over previous generations, offering superior thermal stability and a more robust physical construction to withstand the turbulent internal environments of industrial machinery.

Technical Configuration

The model 330105-05-30-10-02-05 utilizes a modular code to define its mechanical and electrical interface:

Reverse Mount Architecture (330105)

The 330105 designation specifies the reverse mount configuration. This probe lacks the external hex nut found on standard probes, instead utilizing a design that threads into a probe housing or sleeve from the rear.

Total Length Option (10)

This unit features a total length of 1.0 meter (3.3 feet). In the Bently Nevada 3300 XL ecosystem, the probe length is a critical electrical parameter. This 1-meter probe must be paired with a 4-meter or 8-meter extension cable to reach the standard 5-meter or 9-meter system calibration.

Connector Option (02)

The probe comes equipped with the Miniature ClickLoc™ coaxial connector. This gold-plated, locking connector prevents signal loss caused by high-frequency vibration and ensures a moisture-resistant seal when properly mated.

Agency Approval Option (05)

The 05 option indicates Multiple Approvals. This certifies the probe for use in globally recognized hazardous areas, meeting ATEX, CSA, and IECEx standards for intrinsic safety and non-incendive environments.

Technical Specifications

Installation Guide

Reverse mount probes require specific engineering attention during the installation phase to ensure data accuracy.

Gap Voltage Setting

Install the probe into the mounting sleeve. Using a digital multimeter, monitor the voltage at the Proximitor® output. Rotate the probe until the voltage reaches -10.00 VDC, which indicates the probe is at the "Mechanical Center" of its linear range.

Mechanical Clearances

Ensure the probe tip does not contact the shaft during machine startup or thermal expansion. A physical "bottoming out" of the probe tip will cause immediate and permanent damage to the PPS material.

Connector Protection

While the ClickLoc™ connector is robust, always use silicone lubricant on the connector threads to prevent galling and ensure a liquid-tight seal against oil mist inside the machine housing.

Engineering Advantages

Enhanced Material Durability

The probe tip consists of Polyphenylene sulfide (PPS), a high-performance thermoplastic. This material resists chemical degradation from aggressive synthetic lubricants and maintains structural integrity even at temperatures reaching 177°C.

Superior Thermal Stability

The 3300 XL hardware minimizes "thermal drift," a common issue where temperature changes are misread as shaft movement. This ensures that the vibration data remains accurate during the machine's transition from cold start to full-load operating temperature.

Maintenance Accessibility

The reverse mount design simplifies sensor replacement. Technicians can replace a damaged probe without removing the machine's top cover or bearing caps, significantly reducing downtime during maintenance outages.

Technical FAQs

Q1: This model is replaced by 330106-05-30-10-02-CN. Can I still use the 330105?

A1: Yes. The 330105 remains a valid part for existing systems. The 330106 is the updated version that primarily consolidates certain manufacturing standards and adds CN (Chinese) regional certifications, but they are functionally interchangeable in most applications.

Q2: What happens if I use a 1.0m probe with the wrong extension cable?

A2: The system calibration will fail. A 1.0m probe is designed to work with specific Proximitor® sensors (either a 5m system or a 9m system). Using an incorrect cable length shifts the linear range and changes the scale factor (mV/mil), making your vibration readings inaccurate.

Q3: Can the PPS tip withstand high-pressure environments?

A3: The 8mm probe is designed to seal against pressure up to 7 bar (100 psi) at the probe tip. For higher pressure applications, specialized high-pressure housings are required.

Q4: How do I identify a "ClickLoc™" connector?

A4: Unlike older threaded connectors that require a wrench and safety wire, ClickLoc™ connectors feature a knurled ring that "clicks" into place when fully seated, providing tactile feedback that the connection is secure.