Description

BENTLY 330105-02-12-05-02-05 – Proximity Transducer System

Product Description

The BENTLY 330105-02-12-05-02-05 is a complete proximity transducer system (formerly known as a “probe system”) designed for precise measurement of shaft vibration, axial position (thrust), and speed on rotating machinery. It represents the industry standard for non-contact, eddy-current displacement sensing in critical equipment protection and condition monitoring. A typical BENTLY 330105-02-12-05-02-05 kit includes a proximitor sensor (the oscillator-demodulator), an extension cable, and a probe (transducer) itself, all calibrated together as a matched system to ensure specified performance. Integrating the BENTLY 330105-02-12-05-02-05 into a machinery monitoring framework provides the essential raw data on mechanical movement for both protection and predictive maintenance.

Product Parameters

• System Type: 3300 XL 8mm Proximity Transducer System.

• Components: Includes probe (transducer), extension cable, and proximitor (5-meter standard system length is typical; part number suffix indicates specifics).

• Probe Diameter: 8 mm standard body.

• Tip Style: Typically a stainless steel tip with PPS (Polyphenylene Sulfide) or ceramic insulator.

• Linear Range: Standard range of 2.0 mm (80 mils) from the electrical null point, with a specified linearity across that range.

• Sensitivity: Industry-standard -7.87 V/mm (-200 mV/mil).

• Output: A DC voltage proportional to the gap between the probe tip and the target (Gap Voltage) and an AC voltage proportional to dynamic vibration (for connection to monitor inputs).

• Target Material: Requires a ferromagnetic target (e.g., steel) of sufficient size for proper operation.

• Temperature Rating: Components are rated for operation in typical industrial ambient and surface temperatures.

Advantages and Features

• Industry Standard Performance: Delivers the reliable, high-fidelity displacement data that Bently Nevada systems are known for, forming the foundation of API 670-compliant protection systems.

• Matched System Calibration: The probe, cable, and proximitor are factory calibrated as a single unit, guaranteeing specified sensitivity, linearity, and temperature performance.

• Robust Construction: Designed for long-term reliability in harsh environments near machinery, with durable cabling and connectors.

• Direct Compatibility: Seamlessly interfaces with Bently Nevada 3300, 3500, and other monitoring frames without the need for external signal conditioning.

• Dual Output Signals: Provides both a static DC gap voltage (for position measurement and probe health checks) and a dynamic AC vibration signal.

• Global Support and Recognition: As a cornerstone of predictive maintenance programs, it is widely understood and supported by service engineers worldwide.

Application Cases in Various Fields

• Power Generation (Steam/Gas Turbines): Used to monitor radial shaft vibration on turbine bearings and axial position of the rotor for thrust bearing protection.

• Oil & Gas (Centrifugal & Axial Compressors): Critical for measuring shaft relative vibration on high-speed compressor trains to detect imbalance, misalignment, and shaft instability.

• Hydroelectric Plants: Monitors generator shaft runout and bearing vibration on large vertical hydro units.

• Pulp & Paper: Used on critical large motors and gearboxes driving paper machine sections to prevent catastrophic bearing failures.

• Marine Propulsion: Monitors main propulsion turbine and diesel engine shafts for vibration and axial shift under varying load conditions.

Comparisons with Competing Products

Competing products include proximity probe systems from manufacturers like Emerson (now owning Bently Nevada), GE (Bently Nevada legacy products), and Metrix. Alternative technologies include piezoelectric accelerometers (for casing vibration) and laser displacement sensors. The primary advantage of the BENTLY 330105-02-12-05-02-05 is its universal acceptance, proven track record over decades, and guaranteed compatibility with the vast installed base of Bently Nevada monitoring hardware. Competing eddy-current systems may offer similar specifications, but they often lack the seamless “plug-and-play” integration and global service network associated with this OEM system. Accelerometers measure different phenomena (casing vs. shaft motion) and are not a direct replacement for displacement measurement.

Selection Suggestions and Precautions

• Confirm Complete Kit: Ensure the part number BENTLY 330105-02-12-05-02-05 specifies the complete system (probe, cable, proximitor). Individual components have separate part numbers.

• System Length: Verify the total cable length (e.g., 5m, 9m) indicated in the part number suffix meets the physical installation distance from the probe to the monitor rack.

• Target Requirements: The target area on the shaft must be clean, smooth, concentric, and made of a ferromagnetic material (e.g., carbon steel) larger than the probe sensing area.

• Installation Precision: Proper installation is critical. This includes correct probe mounting depth (using a micrometer and gap-voltage measurement), secure cable routing away from interference sources, and proper connector sealing.

• Never Mix Components: Do not intermix probes, cables, or proximitors from different kits or manufacturers without verifying calibration and performance, as this will lead to measurement errors.

• Environmental Considerations: Ensure the probe temperature rating is suitable for its installed location (e.g., near steam turbine casings).

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