Product Overview

The 330703-010-040-10-02-CN is a high-performance non-contacting displacement sensor from the Bently Nevada 3300 XL 11 mm series. Engineered to provide an extended linear measurement range, this probe is essential for monitoring large-scale rotating machinery where standard 8 mm systems lack the necessary sensing depth. By utilizing eddy current technology, the sensor converts the physical gap between the probe tip and a conductive target into a precise electrical signal. This model is specifically configured with a 4.0-inch case and a 1.0-meter cable, designed to deliver high-fidelity vibration and position data in critical Turbine Supervisory Instrumentation (TSI) applications.

Technical Configuration

This 330703 series probe is defined by a specific mechanical hardware profile:

• Probe Diameter: 11 mm sensing tip for increased linear range

• Thread Specification: 3/8-24 UNF threads

• Case Length: 4.0 inches (approx. 102 mm)

• Unthreaded Length: 1.0 inch (approx. 25 mm)

• Total Cable Length: 1.0 Meter (approx. 3.3 feet)

• Connector Type: Miniature coaxial ClickLoc connector (02 option)

• Linear Range: 4.0 mm (160 mils)

• Scale Factor: 3.94 V/mm (100 mV/mil) when paired with a matching 3300 XL Proximitor

• Certification: CN regional compliance for specific industrial standards

Engineering and Operational Reliability

As a cornerstone of Bently Nevada’s machinery protection portfolio, the 330703-010-040-10-02-CN incorporates advanced durability features:

• High-Strength Construction: The probe housing is built from 300-series stainless steel, while the tip is molded from Polyphenylene Sulfide (PPS) for maximum chemical and moisture resistance.

• CableLoc Integrity: The probe-to-cable junction is designed to withstand up to 220 N (50 lb) of pull strength, ensuring electrical continuity under mechanical stress and intense vibration.

• Hermetic Sealing: Utilizing the patented TipLoc process, the sensing tip is chemically bonded to the probe body, creating a vacuum-tight seal that prevents process fluids from wicking into the internal coil.

• Stable Measurement: Provides reliable data across a wide temperature spectrum, maintaining accuracy in the harsh environments surrounding steam turbines, gas turbines, and large generators.

Primary Asset Protection Applications

The extended 11 mm sensing range makes this probe ideal for monitoring heavy-duty rotating equipment, including:

• Large Turbines: Measuring axial thrust position and differential expansion where significant rotor movement occurs.

• Hydroelectric Units: Monitoring radial vibration and shaft centerline position on large-bore shafts.

• High-Output Pumps and Compressors: Early identification of rotor imbalance, misalignment, and bearing wear.

• System Upgrades: Serving as a modern, high-reliability replacement for legacy 7200-series 11 mm transducer systems.