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        21508-02-12-05-02

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        Bently Nevada 21508-02-12-05-02 is an 8 mm reverse mount probe that provides accurate noncontact displacement measurements for shaft position and vibration monitoring on rotating and reciprocating machinery.
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        Ships by Saturday, October 31
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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 21508-02-12-05-02

        • Manufacturer:
          Bently Nevada
        • Part Number:
          21508-02-12-05-02
        • Product Family:
          7200 Proximity Transducer Systems
        • Product Type:
          8 mm Reverse Mount Probe
        • Stock:
          1
        • Diameter:
          8 mm
        • Configuration Type:
          Reverse
        • Thread Configuration:
          3/8-24
        • Lead Armor:
          No
        • Total Cable Length:
          0.5 m (20 in)
        • Connector Option:
          Miniature male coaxial connector
        • Operating Temperature:
          -30°F to +350°F (-34°C to +177°C)
        • Relative Humidity:
          Up to 95%, non-condensing
        • Weight:
          0.04 kg
        • Estimated shipping dimensions:
          1.2x1x60cm
        • 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 Diagnostics Standards Application Scenarios

        Features:

        • Provides noncontact gap-to-voltage measurement capability with an 80 mil (2 mm) linear measuring range for precise displacement monitoring.
        • Supports vibration, shaft position, phase angle, and eccentricity analysis with a frequency response extending from 0 Hz (DC) to 10 kHz.
        • Compatible with 3300 and 9000 Monitoring Systems and suitable for a wide variety of rotating and reciprocating machinery.
        Condition monitoring systems depend on accurate displacement information to maintain machinery reliability. Bently Nevada 21508-02-12-05-02 contributes to predictive maintenance programs by supplying precise noncontact measurements without physical contact with the target surface. Such capability helps maintenance personnel evaluate machine health before failures occur. Applications span critical assets found in power generation and process industries.

        Industrial users often require sensors that can operate across demanding environmental conditions. Bently Nevada 21508-02-12-05-02 functions within temperatures ranging from -34°C to +177°C and tolerates relative humidity levels up to 95%, non-condensing. The reverse mount design and 3/8-24 thread configuration simplify integration into machinery installations. A miniature male coaxial connector and 0.5 m cable length further support flexible mounting arrangements.

        Diagnostic analysis frequently relies on vibration and shaft position information collected during machine operation. Bently Nevada 21508-02-12-05-02 supports measurements used in Polar and Bode plots, enabling engineers to evaluate machine dynamics and rotor behavior. The probe can assist in identifying bearing wear, shaft eccentricity, and rotor instability. As part of the 7200 proximity transducer family, Bently Nevada 21508-02-12-05-02 provides a practical solution for monitoring rotating and reciprocating equipment across numerous industrial sectors.

        The 21508-02-12-05-02 Bently Nevada 8 mm Reverse Mount Probe may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Bently Nevada 21508-02-12-05-02 8 mm Reverse 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 21508-02-12-05-02 8 mm Reverse Mount Probe Specs

        General

        • Manufacturer Bently Nevada
        • Model 21508-02-12-05-02
        • Condition New Original ready stock
        • Product Family 21508-02-12-05-00,21508-02-12-50-02,21508-02-12-90-02
        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.
        • Shaft Vibration Diagnosis: Accurately captures the dynamic radial vibration of high-speed rotating shafts through non-contact measurement.
        • Axial Displacement Diagnosis: Monitors rotor axial movement in real time to prevent severe collisions between moving and stationary parts.
        • Key Phase Signal Diagnosis: Provides accurate speed and phase references for unbalanced state analysis.
        • Eccentricity Diagnosis: Monitors the degree of shaft bending during unit start-up and shutdown to ensure safe passage through critical speeds.
        • API 670 Standard: Fully compliant with the stringent industry standards of the American Petroleum Institute for mechanical protection systems.
        • Hazardous Area Standard: Holds ATEX/IECEx explosion-proof certification, allowing use in high-risk oil and gas explosion areas.
        • Mechanical Precision Standards: Strictly meets the high precision requirements of the Bentley 3300 XL series for linearity and interchangeability.
        • Environmental Resistance Standards: Possesses extremely high enclosure protection and chemical corrosion resistance, adaptable to harsh industrial environments.
        • Installation in Confined Spaces: The reverse mount design perfectly solves the problem of measurement point layout under limited external space.
        • Large Turbine Machinery: Widely used for monitoring the condition of critical bearings in steam turbines and gas turbines in power plants.
        • Compressor Unit Protection: Plays a core role in asset protection for centrifugal compressors in the petrochemical industry.
        • Hydropower Generator Sets: Used for long-term trend monitoring of low-frequency vibration and runout of the main shaft of large hydropower turbines in hydropower stations.
        Description
        Bently Nevada 21508-02-12-05-02 belongs to the 7200 series 8 mm proximity transducer systems, which operate as noncontacting gap-to-voltage transducer systems. The probe measures both static and dynamic distances between the probe tip and the target surface, making it suitable for applications requiring precise displacement monitoring. The system offers a linear measuring range of 80 mils (2 mm) and complies with API 670 requirements.

        Featuring an 8 mm diameter and reverse configuration, Bently Nevada 21508-02-12-05-02 uses a 3/8-24 thread arrangement and incorporates a miniature male coaxial connector. The probe is supplied with an integral coaxial cable and a total cable length of 0.5 m (20 in). No lead armor is included, providing a compact construction for installation in machinery monitoring systems.

        Bently Nevada 21508-02-12-05-02 is compatible with 3300 and 9000 Monitoring Systems when used together with an extension cable and Proximitor®. The complete proximity transducer system delivers a frequency response from 0 Hz (DC) to 10 kHz, enabling reliable measurements over a broad operating range. Such performance supports condition monitoring programs in critical industrial equipment.

        Common applications include radial vibration measurements for detecting rotor imbalance, misalignment, and bearing condition. Axial thrust position monitoring helps identify thrust bearing wear and potential bearing failure, while shaft average radial position measurements provide information related to rotor stability and attitude angle. Bently Nevada 21508-02-12-05-02 can also be used for vibration amplitude and phase angle analysis in Polar and Bode formats, as well as eccentricity measurements to determine rotor bow. Typical machinery includes gas turbines, steam turbines, compressors, pumps, centrifuges, electric motors, generators, and reciprocating equipment. The probe operates over temperatures from -30°F to +350°F (-34°C to +177°C) and supports relative humidity up to 95%, non-condensing.
        Alternative Names
        2150802120502 215O8-O2-12-O5-O2 2I508-02-I2-05-02 21508-02-12-05-00 21508-02-12-05-CN 21508-02-12-05-BR 21508-02-12-05-RU 21508-02-12-10-02
        Technical notes
        Engineered for harsh industrial environments, the Bently Nevada 21508-02-12-05-02 8 mm proximity probe seamlessly integrates with 3300 XL series extension cables to provide reliable eddy current hazard-area sensing.
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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 measurements can Bently Nevada 21508-02-12-05-02 perform?
        Bently Nevada 21508-02-12-05-02 measures static and dynamic displacement and supports radial vibration, axial thrust position, shaft position, vibration phase angle, and eccentricity monitoring.
        How does Bently Nevada 21508-02-12-05-02 connect to monitoring systems?
        A complete system consists of the probe with integral coaxial cable, an extension cable, and a Proximitor®, allowing compatibility with 3300 and 9000 Monitoring Systems.
        Can Bently Nevada 21508-02-12-05-02 be installed on turbines and compressors?
        Yes. Bently Nevada 21508-02-12-05-02 is intended for use with gas turbines, steam turbines, compressors, pumps, centrifuges, electric motors, and generators.
        What frequency response does 21508-02-12-05-02 provide?
        The proximity transducer system offers a frequency response from 0 Hz (DC) to 10 kHz for vibration and displacement measurements.

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