Product Overview

The 330101-48-71-20-02-00 is a high-precision eddy current proximity transducer from the Bently Nevada 3300 XL series, engineered for non-contacting displacement and vibration measurements. This specific model features an extended unthreaded length, making it ideal for deep-mount installations where the probe must pass through thick machine housings or insulation to reach the shaft surface. By converting the gap between the probe tip and the target into a proportional voltage signal, it provides critical data for the continuous monitoring of high-speed rotating assets. Its design emphasizes thermal stability and electromagnetic resilience, ensuring signal integrity in the most challenging industrial environments.

Essential Hardware Parameters and Measurement Capabilities

• Model Number: 330101-48-71-20-02-00

• Sensor Diameter: 8 mm

• Thread Specification: 3/8-24 UNF

• Unthreaded Length: 4.8 Inches

• Total Case Length: 7.1 Inches

• Integral Cable Length: 2.0 Meters (6.6 feet)

• Lead Wire Technology: Standard Coaxial with ClickLoc Connector

• System Compliance: API 670 Standard for vibration and position monitoring

• Net Weight: 0.06 kg

• Product Dimensions: 1.8 x 1.6 x 123 cm

• Origin: United States

Industrial Monitoring Deployments

This 8 mm proximity probe is a fundamental component of Turbine Supervisory Instrumentation (TSI) systems used in power generation, oil and gas, and petrochemical processing. The 330101-48-71-20-02-00 is primarily utilized to track radial vibration and axial thrust position on machines equipped with fluid-film bearings, such as steam turbines, centrifugal compressors, and industrial pumps. Its extended 4.8-inch unthreaded section allows for flexible gapping in complex bearing housings. Additionally, it serves as an accurate Keyphasor reference for phase angle measurements and rotational speed tracking, providing the essential timing data required for advanced machinery diagnostics and predictive maintenance.

FAQ

Q: Why does this probe have such a long unthreaded section?

A: The 4.8-inch unthreaded length allows the probe to be inserted deeply into a smooth bore or sleeve before the threads engage. This is specifically designed for machines with thick outer casings or internal obstructions where a fully threaded probe would be difficult to install.

Q: Is the 330101-48-71-20-02-00 compatible with the 3500 monitoring system?

A: Yes, it is fully compatible. While it is part of the 3300 XL transducer line, it provides the standard voltage output required by the 3500/42M Proximitor Monitor and other Bently Nevada machinery protection systems.

Q: What is the benefit of the ClickLoc connector?

A: The ClickLoc is a miniature gold-plated coaxial connector that provides a secure, vibration-resistant link to the extension cable. It ensures a positive mechanical connection that is less likely to loosen over time compared to standard screw-on connectors.

Q: Does this 2.0-meter probe require a specific extension cable?

A: Yes. To maintain the 5-meter or 9-meter electrical calibration of the system, this 2.0-meter probe must be matched with the correct extension cable length (e.g., a 3.0-meter or 7.0-meter cable) to reach the total required system length.

Q: Can this sensor be installed near high-frequency radio equipment?

A: Absolutely. The 3300 XL series features enhanced RFI/EMI immunity, meeting European CE mark requirements. This allows for reliable operation even when installed in non-metallic fiberglass housings without the need for specialized shielding.