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      21504-000-040-10-02

      Proximity Probe
      Ships by Saturday, November 7
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Bently Nevada 21504-000-040-10-02 is an 8 mm eddy-current proximity probe for a matched 7200 measuring chain, with standard 3/8-24 mounting and an unarmored integral lead.
      • Manufacturer part number
        21504-000-040-10-02
      • Shipping
        Swift global dispatch
      • Condition
        New, original product
      • Shipping size (est.)
        1.6cm x 1.3cm x 69cm
      • Country of Origin
        USA

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      What happens after you enquire

      • 0

        Review your reference

        Send the complete 21504-000-040-10-02 marking, quantity and actual mounting/connector details for configuration review.

      • 1

        Confirm the offer

        Review the quoted condition, included items and dispatch date for 21504-000-040-10-02 before approving the order.

      • 2

        Arrange dispatch

        Confirm delivery details and receive tracking for the agreed 21504-000-040-10-02 supply scope.

      • Match the complete marking

        Retain 21504-000-040-10-02 exactly, including every zero and suffix, when comparing the supplied item with the installed assembly.

      • Check the offered item before ordering

        Request current 21504-000-040-10-02 item and connection photos; compare the mechanical interface, included parts and measuring-chain requirements.

      Technical specifications for 21504-000-040-10-02

      • Manufacturer:
        Bently Nevada
      • Product Category:
        Machinery Monitoring Systems
      • Spare Part Number:
        21504-000-040-10-02
      • Weight:
        0.05 kg
      • Tariff Code:
        8537101190
      • Base construction:
        21504
      • Transducer family:
        7200 5 mm and 8 mm system
      • Measurement principle:
        Noncontact eddy current
      • Probe tip diameter:
        8 mm
      • Mounting configuration:
        Standard forward mount
      • Case thread:
        3/8-24
      • Lead armor:
        None
      • Probe-tip material:
        Polyphenylene sulfide (PPS)
      • Coaxial cable impedance:
        95 ohms
      • Probe and extension temperature:
        -34 to +177 deg C
      • Maximum relative humidity:
        95%; noncondensing
      • Matched-system calibrated span:
        2.0 mm (80 mils)
      • Matched-system nominal scale factor:
        200 mV/mil (7.87 V/mm)
      • Matched-system frequency response:
        DC to 10 kHz; -5% at 10 kHz
      • Reference target:
        AISI 4140 steel at +22 deg C
      View as PDF Ask for Quote

      Information

      Overview Downloads Applications / Compatibility Product Precautions
      • In a shaft-monitoring channel, Bently Nevada 21504-000-040-10-02 places the sensing tip at the target while its coaxial lead carries the radio-frequency signal to a separate conditioner.
      Construction: 8 mm PPS tip
      Mounting: Standard 3/8-24 case
      Lead: Unarmored coaxial connection
      A matched 7200 channel supports static position as well as dynamic displacement measurements. Select the total cable arrangement and monitor interface together.

      The PPS tip provides the 8 mm construction with resistance to direct water and lubricating-oil contact. Protect the rest of the channel from condensation and physical damage.

      Set the gap against the actual machine target and verify response after a component change. Keep electrical calibration records separate from mechanical fit measurements.
      Controller platform reference: 7200 proximity-transducer measuring chain.
      Technical downloads for Bently Nevada 21504-000-040-10-02: a manufacturer technical excerpt and an Apter Power installation and commissioning guide.
      The technical reference preserves selected manufacturer pages. The installation guide is compiled by Apter Power for preparation and review; apply the original operating procedures and site controls during work.
      System and supply context: Bently Nevada 21504-000-040-10-02 is an unarmored 8 mm proximity probe with a standard 3/8-24 case. It operates with the matching 7200 extension cable, Proximitor and monitoring instrument.

      Platform applications: These applications describe functions of the complete 7200 measuring channel. Check the target, electrical length and monitor configuration for the installed machine.
      Prepare Bently Nevada 21504-000-040-10-02 with the specified mechanical interface, signal-chain components and site isolation controls.
      Preserve the electrical chain

      Match integral lead, extension cable and conditioner to the installed 5 m or 9 m system configuration.

      Protect the unarmored lead

      Avoid physical abuse at the probe junction and cable route. Do not treat the coaxial lead as a power-input cable.

      Verify the actual mounting

      Match the standard 3/8-24 thread and actual case dimensions without altering the complete ordered reference.

      Check the calibration target

      Verify system response with the actual target; AISI 4140 steel is the reference calibration material.

      Separate thermal zones

      Keep the probe/extension within -34 to +177 deg C and the separate Proximitor within -51 to +100 deg C.

      Keep the chain dry

      Respect the 95% noncondensing humidity limit and protect the connector and field wiring from contamination.

      Alternative Names

      Bently Nevada 21504-000-040-10-02 21504-000-040-10-02 proximity probe 7200 21504 base-design probe (21504-000-040-10-02)

      Technical notes

      System matching: Keep the probe, extension cable and Proximitor matched as one electrical chain. Verify the installed total length before replacing a component.

      Mechanical fit: Match the 3/8-24 interface and actual case geometry. Protect the unarmored lead and retain the complete 21504-000-040-10-02 marking in the assembly record.

      Technical reference: Bently Nevada 7200 Proximity Transducer Systems, 5 mm and 8 mm, L5001 (04/90).

      FAQ View All FAQ

      • How does 21504-000-040-10-02 sense a conductive shaft without touching it?
        The 7200 Proximitor excites the probe with a radio-frequency signal. Eddy-current losses change as the target moves, and the conditioner converts the returned signal into a gap-related voltage for the monitor.
      • Which mechanical features distinguish 21504-000-040-10-02 from an armored probe?
        The 21504 construction uses an 8 mm tip, standard mounting and a 3/8-24 case thread with no lead armor. Protect the exposed lead against physical damage and verify the actual case geometry at the mounting location.
      • Why is the measuring-chain length important when fitting 21504-000-040-10-02?
        The integral probe lead and extension cable form a combined electrical length matched to the Proximitor. The 18745-03 conditioner is for a 5 m chain and the 18745-04 for a 9 m chain; retain the applicable complete combination.
      • What does the calibrated span mean for a channel using 21504-000-040-10-02?
        The matched 7200 system has an 80 mil, or 2.0 mm, calibrated span beginning approximately 10 mil from the probe face. This is a system measurement range, so mechanical positioning must establish the actual operating gap.
      • How can a different target material change the response of 21504-000-040-10-02?
        The reference system calibration uses AISI 4140 steel at +22 deg C with a -24 V DC supply and a 10 kilohm load. A different target changes the electromagnetic coupling, so the installed chain should be checked against its actual target.
      • Should a DC supply be connected directly to the lead of 21504-000-040-10-02?
        The coaxial probe lead connects to the matched measuring chain, not directly to an industrial DC supply. The separate Proximitor receives negative DC power and performs the signal conditioning.
      • Which component temperature limits apply around 21504-000-040-10-02?
        The probe and extension-cable limit is -34 to +177 deg C, while the separate Proximitor limit is -51 to +100 deg C. Locate each component within its own permitted range rather than applying the probe limit to the conditioner.
      • What protection does the PPS tip of 21504-000-040-10-02 provide in a wet installation?
        The 8 mm probe tip uses PPS, and its stated corrosion-resistance performance includes direct contact with water and lubricating oil. The measuring-chain environment still has a 95% noncondensing humidity limit; a robust tip does not make the entire installation submersible.
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