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        21504-000-020-10-02

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        The Bently Nevada 21504-000-020-10-02 8 mm Standard Mount Probe delivers precise, non-contact shaft position and vibration measurements for rotating machinery. Its 3/8-24 threaded design and miniature coaxial connector ensure reliable installation and signal integrity in industrial environments.
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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.
        Shipping Mode
        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.
        Parts Availability
        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 21504-000-020-10-02

        • Manufacturer:
          Bently Nevada
        • Part Number:
          21504-000-020-10-02
        • Product Family:
          7200 Proximity Transducer Systems
        • Diameter:
          8 mm
        • Configuration type:
          Standard
        • Configuration threads:
          3/8-24 thread
        • Lead armor:
          no
        • Unthreaded Length:
          000=0.0 inches
        • Overall Case Length:
          020= 2.0 inches
        • Connector Option:
          02=With miniature male coaxial connector.
        • Operating Temperature:
          -30°F to +350°F (-34°C to +177°C).
        • Weight:
          0.05 kg
        • Estimated shipping dimensions:
          1.6x1.3x69cm
        • Tariff Code:
          9017800000
        • 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 Standard Installation Applications

        Features:

        • High-Resolution Eddy Current Measurement Enables Accurate Shaft Position And Vibration Monitoring
        • Robust 3/8-24 Threaded Construction Supports Secure Installation In Harsh Industrial Conditions
        • Broad Compatibility With 3300 And 9000 Systems Facilitates Flexible Integration And Upgrades Introductory Paragraphs
        The Bently Nevada 21504-000-020-10-02 8 mm Standard Mount Probe provides reliable, non-contact measurement of shaft displacement, radial vibration, and axial thrust in a variety of rotating and reciprocating machinery. Its sturdy 3/8-24 thread and miniature coaxial connector allow straightforward installation while maintaining secure electrical connections in demanding industrial environments.

        As part of the 7200 series, the 21504-000-020-10-02 supports a full frequency range from DC to 10 kHz, offering accurate data for vibration amplitude, phase angle, and eccentricity diagnostics. These features make it suitable for early detection of rotor imbalance, misalignment, or bearing wear, helping reduce unplanned downtime.

        Designed to meet API 670 requirements and compatible with legacy 3300 and 9000 monitoring systems, this probe ensures seamless integration into existing condition monitoring programs. Its combination of mechanical robustness, precise measurement, and operational flexibility makes the 21504-000-020-10-02 a valuable component for predictive maintenance strategies, extending equipment life and ensuring continuous machinery protection.

        The 21504-000-020-10-02 Bently Nevada 8 mm Standard Mount Probe may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Bently Nevada 21504-000-020-10-02 8 mm Standard Mount 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 21504-000-020-10-02 8 mm Standard Mount Probe Specs

        General

        • Manufacturer GE / Bently Nevada
        • Model 21504-000-020-10-02
        • Condition New Original ready stock
        • Product Family 21504-00-16-10-02,21504-04-036-05-02,21504-04-036-10-02
        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.
        • API 670 Compliance: As an early benchmark in industrial monitoring, this probe design fully complies with the stringent requirements of API 670 for non-contact displacement sensors.
        • 7200 Series Architecture: Utilizing a 3/8-24 inch thread, it is one of the most widely installed sensor series in the global petrochemical and power industries.
        • Impedance Matching Technology: The internal coil impedance is precisely corrected to ensure a stable 200 mV/mil signal output under varying ambient temperatures.
        • Gold-Plated Coaxial Connector: The coaxial connector at the cable end is gold-plated to minimize electrical noise during signal transmission.
        • Compact Fully Threaded Design: Code 000-020 represents a 2.0-inch fully threaded housing. This short housing design is ideal for installation in tight bearing cap spaces.
        • 1.0-meter Short Cable Configuration: The probe comes with a 1.0-meter original cable (code-10), typically requiring an extension cable to reach a total length of 5 or 9 meters.
        • Oil-resistant material: The probe head uses polyphenylene sulfide (PPS) insulation, allowing for long-term immersion in various turbine oils and synthetic lubricants.
        • Flexible stainless steel armor: Although this specific suffix does not include armor, its cable structure supports high-curvature wiring without affecting signal strength.
        • Thrust bearing wear monitoring: Installed on both sides of the unit's thrust disc to monitor axial displacement (thrust position) and prevent rotor impact with the stator.
        • Radial vibration in large and medium-sized pumps: Widely used in the bearings of feedwater pumps and injection pumps to monitor the radial vibration of the journal relative to the bearing.
        • Steam turbine thermal expansion compensation: Used to monitor the expansion displacement of the unit's casing relative to the foundation under certain special operating conditions.
        • Upgrading monitoring of older units: Can be directly replaced as a spare part for 7200 series systems installed in the 1980s and 1990s without requiring changes to mechanical openings.
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        Description
        The Bently Nevada 21504-000-020-10-02 8 mm Standard Mount Probe is part of the 7200 series of eddy current proximity transducers, engineered for accurate displacement measurements on a wide range of rotating and reciprocating machinery. Designed for compatibility with 3300 and 9000 Monitoring Systems, this probe is ideal for gas and steam turbines, compressors, pumps, centrifuges, electric motors, and generators. Its non-contacting, gap-to-voltage technology ensures both static and dynamic distance measurements with high reliability.

        With an 8 mm probe diameter and a standard 3/8-24 thread configuration, the 21504-000-020-10-02 offers robust mounting options while accommodating a miniature male coaxial connector. The system provides 80 mils (2 mm) of linear measuring range and a frequency response from DC to 10 kHz, making it suitable for high-resolution vibration, axial thrust, and shaft position monitoring. These capabilities allow maintenance teams to detect rotor imbalance, misalignment, thrust bearing wear, and other early signs of mechanical degradation.

        The 7200 series, including the 21504-000-020-10-02, supports radial and axial measurements as well as diagnostic plotting in Polar and Bode formats. Its design meets API 670 requirements, ensuring industrial-standard compliance for critical machinery protection. Operating temperatures range from -34 °C to +177 °C (-30 °F to +350 °F), providing reliability under extreme process conditions.

        Whether used for continuous condition monitoring or periodic diagnostic assessments, the 21504-000-020-10-02 8 mm Standard Mount Probe integrates seamlessly with extension cables and Proximitor modules, maintaining high signal fidelity and mechanical stability. Its flexible deployment makes it an ideal solution for both new installations and upgrades of existing 3300 or 9000 system infrastructures.

        The 7200 series probes, exemplified by the 21504-000-020-10-02, offer long-term industrial value by combining precision measurement, robust mechanical design, and broad compatibility, enabling predictive maintenance strategies that reduce downtime and extend the service life of critical machinery.
        Alternative Names
        21504-000-012-10-02 21504-000-016-10-02 21504-000-024-10-02 21504-000-040-10-02 21504-000-052-10-02 21504-000-076-05-02
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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 types of machinery can the 21504-000-020-10-02 probe monitor?
        It is compatible with gas and steam turbines, compressors, pumps, centrifuges, electric motors, and generators, providing versatile monitoring for critical rotating equipment.
        How does the probe detect shaft vibration and position?
        The 7200 series uses eddy current technology to convert gap distance into voltage signals, accurately measuring both static and dynamic shaft movements.
        Can it detect axial thrust as well as radial vibration?
        Yes, the 21504-000-020-10-02 measures axial thrust position, enabling early detection of thrust bearing wear and potential failures.
        How does it comply with API 670 standards?
        Its linear measuring range, frequency response, and robust construction meet API 670 requirements for machinery protection and monitoring.

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