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        • Lifecycle status

           Active / Available from OEM
          Apter Power provides brand-new, factory-current Bently Nevada NSv proximity probes, delivering precise shaft vibration and position tracking for compact industrial turbomachinery.

        330851-04-000-030-10-00-05

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        The Bently Nevada 330851-04-000-030-10-00-05 3300 XL 25 mm Proximity Probe is a eddy-current sensor designed for industrial machinery condition monitoring.
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        Ships by Friday, October 30
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 330851-04-000-030-10-00-05

        • Manufacturer:
          Bently Nevada
        • Part Number:
          330851-04-000-030-10-00-05
        • Product Family:
          3300 XL 25mm Proximity Transducer System
        • Product Type:
          3300 XL 25 mm Proximity Probe
        • Stock:
          1
        • Probe Case Type:
          Smooth 1.06 in. dia. - Side Exit
        • Unthreaded Length:
          0.0 in.
        • Overall Case Length:
          3.0 in.
        • Total Length:
          1.0 metre (3.3 feet)
        • Armor Option:
          No Armor
        • Output Scale Factor:
          0.787 V/mm (20 mV/mil)
        • Linear Range:
          12.7 mm (500 mils)
        • Weight:
          0.3 kg
        • Estimated shipping dimensions:
          3x2.7x2.5cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Use Cases Operating Environment Monitoring & Control

        Features:

        • Differential Expansion Measurement for Steam Turbine Generator Sets
        • Extended 12.7 mm Linear Range with High Sensitivity Output
        • Flexible Mounting Options for Collar and Ramp Targets
        The 330851-04-000-030-10-00-05 operates as the 3300 XL 25 mm Proximity Probe within the 3300 XL 25 mm Transducer System, providing precise proximity measurement for differential expansion monitoring on mid-size to large steam turbine generators. It continuously converts physical gap changes between the probe tip and the target surface into a proportional electrical output of 0.787 V/mm (20 mV/mil) across its 12.7 mm (500 mils) linear range, and transmits this signal through the extension cable to the 3300 XL 25 mm Proximitor Sensor for conditioning and distribution to the monitoring system. Seamless measurement continuity is standard with the 330851-04-000-030-10-00-05; however, using an optional dual-probe redundant configuration will allow seamless switchover to a backup observation point in the event of a primary probe failure or signal degradation.

        The 330851-04-000-030-10-00-05 provides essential sensing functions critical to the differential expansion measurement path, and is a vital component of the machinery protection system, directly affecting the proper, normal monitoring of thermal growth differentials between the turbine rotor and machine stator. One or two 330851-04-000-030-10-00-05 probes are required per DE measurement point depending on the desired redundancy level and target configuration. The 330851-04-000-030-10-00-05 is mounted in a standard probe holder position on the machine casing and is always oriented to observe the DE target surface, whether collar or ramp, at the appropriate standoff distance.

        For dual redundant differential expansion applications, the monitoring system requires a second 330851-04-000-030-10-00-05 probe observing the same side of the collar. In addition to standard single-probe operation, the redundant configuration also performs automatic cross-checking. The dual-probe configuration executes measurement verification using the internal logic specified in the monitoring system options.

        The 330851-04-000-030-10-00-05 Bently Nevada 3300 XL 25 mm Proximity Probe may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Bently Nevada 330851-04-000-030-10-00-05 3300 XL 25 mm Proximity Probe Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        Bently Nevada 330851-04-000-030-10-00-05 3300 XL 25 mm Proximity Probe Specs

        General

        • Manufacturer Bently Nevada
        • Model 330851-04-000-030-10-00-05
        • Condition New Original ready stock
        • Product Family 330851-04-000-030-10-00-00,330851-04-000-030-10-01-05
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Differential Expansion (DE) Measurement: Primarily used on medium to large steam turbine generators to monitor the growth relative to the machine casing caused by thermal shifts.
        • Thrust Axial Position: Tracks shaft movements along its axis to prevent destructive internal contact.
        • Radial Shaft Vibration: Continuous dynamic monitoring of fluid-film bearing machines to detect rotor imbalance or misalignment.
        • Speed Sensing and Keyphasor References: Records timing and rotational speed indicators via target notches or keyways on the rotating shaft.
        • Extreme Temperature Limits: Continually operates with precision up to 200 °C (392 °F), and survives short-term intermittent exposures up to 250 °C (482 °F).
        • High Moisture Protection: Built with dual front and rear seals combined with a standard FluidLoc cable to block moisture, oil, or chemical ingress.
        • Robust Mechanical Strength: Employs TipLoc molding for tip-to-body adhesion and a CableLoc design resisting up to 330 N (75 lbf) of pulling force.
        • Materials: Heavy-duty Polyetheretherketone (PEEK) probe tip paired with an AISI 304 stainless steel case.
        • Signal Output Proportionality: Transmits a voltage output of 0.787 V/mm (20 mV/mil) directly mapped to the physical distance to any conductive target.
        • Full Component Interchangeability: Probes, cables, and Proximitor sensors can be swapped out off-the-shelf without any manual bench calibration or component tuning.
        • Electrical Noise Defense: Highly immune to radio frequency interference (RFI) and electromagnetic interference (EMI), allowing reliable operations near high-frequency radio signals.
        • System Integration: Fully matches older legacy configurations (such as the 7200 25 mm and 35 mm series), facilitating complete modular monitor upgrades without structural redesigns.
        Description
        The Bently Nevada 330851-04-000-030-10-00-05 is a 3300 XL 25 mm Proximity Probe specifically designed for measuring differential expansion (DE) on mid-size to large steam turbine generators. This 330851-04-000-030-10-00-05 probe addresses the critical challenge of monitoring the difference in growth rates between the turbine rotor and the machine stator (casing), which is essential for preventing catastrophic mechanical failures caused by thermal expansion mismatches during turbine startup, shutdown, and load changes.

        In differential expansion measurement applications, the 330851-04-000-030-10-00-05 is typically deployed in one of several mounting arrangements. Two transducers, including the 330851-04-000-030-10-00-05, may observe the same side of a collar to provide redundant measurements, which is the preferred configuration when sufficient collar height is available. Alternatively, two complementary input transducers, such as the 330851-04-000-030-10-00-05 paired with another probe, can observe opposite sides of a collar to effectively double the measurable DE range. Another arrangement involves one 330851-04-000-030-10-00-05 viewing a ramp on the rotor while a second transducer views either a separate ramp or a different location on the rotor to compensate for radial movement, though this adds some measurement error while enabling longer total DE distance measurement. The criteria for selecting a mounting method include the size of the available target, the expected amount of rotor axial movement, and the type of DE target present in the machine, whether collar or ramp.
        Alternative Names
        330851 04 000 030 10 00 05 330851-04-000-030-10-00-00 330851-04-000-030-10-01-05 330851-04-000-030-50-00-05 330851-04-000-030-90-00-05 330851-03-000-030-10-00-05
        Technical notes
        The Bently Nevada 330851-04-000-030-10-00-05 3300 XL 25 mm Proximity Probe, an important component of the 3300 XL 25 mm transducer system, features a 25 mm (1.06 inch) smooth side-mounted housing with a length of 30 mm. It comes with a 1.0-meter PTFE-insulated 75-ohm shielded cable terminated with a ClickLoc miniature coaxial connector and includes a dedicated connector protection kit.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What industrial problems does the 330851-04-000-030-10-00-05 solve?
        It is designed to monitor differential thermal expansion in large rotating machines, helping prevent rotor-to-stator contact, excessive mechanical stress, and unexpected equipment failures.
        Why is differential expansion monitoring important?
        During startup, shutdown, and load changes, rotating and stationary components expand at different rates. Continuous monitoring helps maintain proper clearances and reduces the risk of mechanical damage.
        What equipment is the 330851-04-000-030-10-00-05 probe typically installed on?
        It is commonly applied to large steam turbine generators and other heavy-duty rotating machines requiring differential expansion and axial displacement monitoring.
        What installation advantages does the 330851-04-000-030-10-00-05 probe offer?
        Its smooth side-exit housing is well suited for installations with limited space, while brackets, bushings, or clamps can be used to securely mount the 30 mm probe casing.

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