Product Overview

The Bently Nevada 330101-00-77-20-02-00 is a high-precision 8mm proximity sensor belonging to the industry-standard 3300 XL series. This transducer is engineered for non-contact measurement of shaft vibration and position within fluid-film bearing machines. By utilizing eddy current technology, it provides critical real-time data to Turbine Supervisory Instrumentation (TSI) systems, enabling the detection of mechanical anomalies before they lead to equipment failure.

This specific model features a 3/8-24 UNF threaded body, a 7.7-inch total case length, and a 2.0-meter integrated cable. It is designed for maximum interchangeability, allowing for seamless replacement of probes, extension cables, and Proximitor sensors without the need for individual component calibration or circuit trimming.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Identification: 330101-00-77-20-02-00

• Probe Diameter: 8 mm

• Thread Type: 3/8-24 UNF (English)

• Unthreaded Length: 0.0 inches

• Overall Case Length: 7.7 inches

• Total Cable Length: 2.0 Meters (6.6 feet)

• Connector: Gold-plated Miniature Coaxial ClickLoc

• Armor Option: Included (Stainless Steel flexible armor)

• Agency Approvals: Standard multi-certification (ATEX, IECEx, CSA)

• Scale Factor: 7.87 V/mm (200 mV/mil)

• Dimentions:1.8x1.6x12.3 cm

Design and Performance Characteristics

• Enhanced Connectivity: The gold-plated ClickLoc connector system provides a secure, vibration-resistant mechanical link while maintaining superior electrical conductivity and corrosion resistance.

• Advanced Durability: Featuring TipLoc molding, the probe tip is chemically bonded to the probe body, preventing detachment under high-pressure or high-flow conditions. The CableLoc design ensures the cable remains securely attached to the probe with a pull strength of up to 220 N (50 lb).

• RFI/EMI Immunity: The 3300 XL system is engineered to suppress radio frequency and electromagnetic interference, allowing for clean signal transmission even in electrically noisy industrial environments without requiring specialized shielded conduit.

• Broad Operational Range: The probe maintains high accuracy across a temperature range of -51°C to +177°C (-60°F to +350°F), making it suitable for the extreme thermal environments found in steam and gas turbines.

• Interchangeability: Full compatibility with 3300 XL extension cables and Proximitor sensors ensures that maintenance teams can replace individual parts without system recalibration.

Typical Applications

The 330101-00-77-20-02-00 probe is a vital component for monitoring high-speed rotating assets in power generation, oil and gas, and petrochemical sectors. Primary use cases include:

• Radial vibration monitoring of turbine shafts.

• Axial (thrust) position measurement for rotor safety.

• Eccentricity and speed measurements.

• Keyphasor reference for phase angle and diagnostic analysis.