Bently Nevada 330193-00-04-05-00 3300 XL 8 mm Extended Temperature Range (ETR) Proximity Probe

Product Overview

The Bently Nevada 330193-00-04-05-00 is a specialized 8 mm eddy current proximity probe part of the 3300 XL Extended Temperature Range (ETR) series. This transducer is engineered for non-contacting displacement and vibration measurements in extreme thermal environments, providing a significantly higher temperature rating than standard proximity probes. It is primarily utilized in the monitoring of gas turbines, steam turbines, and other high-heat rotating machinery where standard sensors would fail.

This configuration features an M10 x 1 metric thread with a 40 mm overall case length and no unthreaded portion. The assembly includes a 0.5-metre (1.6 feet) integral cable. When used as part of a complete 3300 XL ETR Transducer System, it maintains a stable linear scale factor of 7.87 V/mm (200 mV/mil) across its operating range, ensuring accurate machinery protection data for radial vibration and axial position monitoring.

Technical Configuration

Ordering Information

Accurate configuration is critical for mechanical fit and electrical loop matching. The 330193-00-04-05-00 part number is defined by the following suffix options:

Engineering & Installation Guide

Thermal Performance Management:

The Extended Temperature Range (ETR) series is designed to withstand continuous exposure up to 260°C (500°F). During installation, technical personnel must account for the thermal growth of the machine casing and rotor. The DC gap voltage set at ambient temperature will shift as the machine reaches operating temperature; refer to the 3300 XL ETR datasheet for temperature-dependent voltage compensation curves.

Mechanical Mounting:

For M10 x 1 metric threads, the maximum recommended mounting torque is 6.8 N·m (60 in·lb). To maintain the calibrated linear range and avoid "side-view" interference, ensure a minimum side clearance of 13 mm (0.5 in) from surrounding metallic surfaces. The probe tip must be centered on the observed shaft target area.

Loop Calibration and Cables:

This 0.5-metre probe is designed to be paired with a 3300 XL ETR extension cable. The total system length (typically 5.0 or 9.0 metres) must match the calibration of the Proximitor sensor. Using a standard (non-ETR) extension cable or a mismatched total length will result in significant scale factor errors and invalid machinery protection data.

Shielding and Noise Mitigation:

Maintain strict separation between probe cables and high-voltage AC power lines. The coaxial cable shield should be grounded only at the monitor/Proximitor end to prevent ground loops. In high-EMI environments typical of turbine halls, ensure all connections are tight and housed in grounded terminal boxes.

Maintenance & Troubleshooting FAQ

Q: Can I use a standard 3300 XL Proximitor with this ETR probe?

A: Yes, the 3300 XL Proximitor is compatible with both standard and ETR probes, provided the total loop length (5m or 9m) and target material (AISI 4140) match. However, the extension cable must also be an ETR variant to withstand the high-temperature zone.

Q: What indicates a failure due to excessive heat?

A: Thermal failure often manifests as a significant drift in the DC gap voltage that does not correlate with actual shaft movement, or a "Not OK" status on the monitor when the machine is at full temperature that clears once the machine cools.

Q: How do I clean the ClickLoc™ connector?

A: Use only approved electronics-grade contact cleaner. Ensure the connector is completely dry before reassembly. In oil-mist environments, always use connector protectors or self-fusing silicone tape to prevent lubricant ingress.

Q: Why is the unthreaded length (00) important?

A: The unthreaded length determines how much of the probe body can pass through a mounting bracket or sleeve without being restricted by the threads. A "00" option means the entire 40mm case is threaded.