Bently Nevada 330876-03-50-00-00 Proximity Probe

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Bently Nevada 330876-03-50-00-00 is an eddy current proximity probe from the 3300 XL 11 mm sensor family, designed for Bently Nevada TSI and machinery protection systems under Baker Hughes. This non-contact sensor captures shaft radial vibration, thrust position, shaft runout and differential expansion for critical rotating machinery. It must be paired with a matched 3300 XL extension cable and corresponding proximitor to convert metal target clearance into a linear voltage signal, feeding measurement data to 3500 series monitor racks for alarm, trending and protection trip functions.

The 330876 series is built around the mature 3300 XL platform, delivering outstanding thermal stability and consistent linear performance over a wide operating temperature window. Compared to smaller probe variants, the 11 mm probe provides a larger linear measurement range, making it suitable for applications with higher expected shaft movement or larger installation tolerances during commissioning. Since the sensing works by eddy current induction without touching the shaft surface, there is no mechanical friction or wear, even during continuous high-speed operation, which helps maintain stable measurement performance over long service life.

When powered by the paired proximitor, the probe tip generates a high-frequency magnetic field. As the metal target surface moves closer or farther away, eddy currents induced on the shaft alter the probe coil impedance. The proximitor circuit demodulates this impedance variation and outputs a DC signal directly proportional to the gap between probe tip and target. This signal can be used for real-time waveform capture, static position tracking and fast transient detection, which are essential inputs for API 670 compliant machinery protection.

Key Features

• 3300 XL 11 mm eddy current proximity probe, part number 330876-03-50-00-00
• Non-contact measurement principle, zero mechanical wear on probe and shaft target
• Extended linear range, ideal for applications with larger expected shaft displacement
• Excellent long-term stability and temperature compensation for bearing housing environments
• Tolerant to oil mist, lubricant, dust and typical contaminants inside bearing enclosures
• Requires matched extension cable and 3300 XL proximitor for calibrated output
• Threaded body for straightforward mounting and precise gap adjustment on probe brackets
• Fully compatible with Bently Nevada 3500 monitors and legacy 3300 rack systems
• Meets API 670 requirements for safety-critical turbine supervisory instrumentation
• Rugged industrial construction for continuous service in power, oil, gas and petrochemical facilities

Technical Specifications

• Model Series: 3300 XL
• Full Part Number: 330876-03-50-00-00
• Brand: Bently Nevada (Baker Hughes)
• Sensor Type: Eddy current proximity probe
• Nominal Sensing Diameter: 11 mm
• Measured Target: Ferrous and non-ferrous metal shaft surfaces
• Typical Linear Range: 0.5 mm to 4.5 mm
• Installation Style: Threaded mounting into bearing housing or custom probe holder
• System Matching: Must work with 3300 XL extension cable and 3300 XL proximitor
• Compatible Monitors: Bently 3500 series vibration and position monitors, older 3300 racks
• Primary Measurement: Radial vibration, thrust position, shaft offset, differential expansion, runout

Common Applications

The Bently Nevada 330876-03-50-00-00 proximity probe is widely deployed on steam turbines, gas turbines, centrifugal compressors, expanders, large process pumps and blowers. It is commonly selected when a wider linear gap range is required compared to standard 8 mm probes. Typical sites include thermal power plants, combined-cycle facilities, oil refineries, petrochemical complexes, LNG terminals and offshore production platforms. It is a common spare for new instrument skid build, field retrofits, scheduled sensor replacement and inventory stocking for existing 3300 XL monitoring loops.

Our Supply Information

We supply original Bently Nevada 330876-03-50-00-00 proximity probes. All items pass visual and functional inspection before shipment. We can also provide matching extension cables and proximitors to complete the measurement chain. Our stock covers the full range of Bently Nevada 3300 XL sensors, cables, proximitors and 3500 rack spare parts. We offer worldwide shipping via DHL, FedEx and UPS, and can issue commercial invoices, packing lists, certificates of origin and other standard export documents for industrial automation spare part orders.

Contact our sales team if you need full-loop quotation, calibration validation, cable and proximitor matching confirmation, lead time, unit price or bulk inquiry for 330876-03-50-00-00. We can also verify compatibility with your existing 3500 monitor configuration.

330876-03-50-00-00

BENTLY BRAND

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