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        18745-03

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        The Bently Nevada 18745-03 Proximitor Sensor is an industrial-grade device designed to provide accurate non-contact measurement of shaft vibration and position in rotating machinery.
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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 18745-03

        • Manufacturer:
          Bently Nevada
        • Part Number:
          18745-03
        • Product Family:
          7200 Proximity Transducer Systems
        • Product Type:
          Proximitor Sensor
        • Stock:
          3
        • Scale factor:
          200 mV/mil (7.87 mV/µm)
        • Linearity:
          ±0.25%
        • Power supply:
          -24 Vdc regulated
        • Frequency response:
          DC to 10 kHz
        • Maximum cable length:
          Up to 9 m
        • Extension cable capacitance:
          69.9 pF/m
        • Probe case material:
          Stainless steel
        • Proximitor housing material:
          Aluminum alloy
        • Operating temperature:
          -35°C to +100°C (-31°F to +212°F)
        • Storage temperature:
          -40°C to +125°C (-40°F to +257°F)
        • Weight:
          0.22 kg
        • Estimated shipping dimensions:
          8x6x5cm
        • 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 Applications Monitoring & Control Performance & Efficiency

        Features:

        • Proven Eddy Current Transducer Technology
        • Fully Compliant with API 670 Standards
        • Ruggedized Design for Demanding Machinery Environments
        The Bently Nevada 18745-03 relies on advanced, time-tested eddy current principles to deliver non-contacting distance measurements. It generates a radio frequency signal through the probe tip to determine the precise gap voltage, eliminating mechanical wear and ensuring an exceptionally long operational lifespan in industrial environments.

        As a genuine factory component from the trusted industry leader, this 7200 Series Proximitor satisfies all strict API 670 requirements for machinery protection systems. It guarantees exact component interchangeability and high-fidelity output signals, providing operators with global safety standard compliance.

        Engineered specifically to survive harsh field conditions, the 18745-03 features a sealed, compact layout capable of operating smoothly across wide temperature spreads from -51°C to +100°C (-60°F to +212°F). This heavy-duty architecture safeguards internal electronics against extreme plant humidity and intense mechanical stress.

        The 18745-03 Bently Nevada 7200 Series Proximitor® Sensor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Bently Nevada 18745-03 7200 Series Proximitor® Sensor 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 18745-03 7200 Series Proximitor® Sensor

        General

        • Manufacturer GE / Bently Nevada
        • Model 18745-03
        • Condition New Original ready stock
        • Product Family 18745-04,21508-02-12,21504-00-32-10-02
        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.
        • Critical Turbomachinery Vibration Diagnostics: Extensively deployed across high-speed assets like steam or gas turbines, centrifugal compressors, and multi-stage pumps to map out real-time mechanical health.
        • Thrust Bearing Wear Detection: Continuously tracks axial shaft position changes to provide early warnings before catastrophic thrust bearing degradation takes place.
        • Radial Shaft Position and Motion Tracking: Monitors dynamic shaft motion within fluid-film bearings to evaluate machine balancing, detect misalignment, and avoid physical rotor-to-stator contact.
        • Rotor Eccentricity and Thermal Growth Monitoring: Measures structural shaft bowing during slow roll start-up phases and tracks long-term thermal growth during standard operational routines.
        • Seamless 3300 and 9000 System Integration: Designed to interface directly with industry-standard Bently Nevada 3300 and 9000 monitoring racks, establishing a cohesive asset protection loop.
        • Gap Voltage Verification: Translates the physical distance between the probe tip and the target into an actionable DC gap voltage, enabling technicians to easily verify sensor alignment during installation.
        • Static and Dynamic Dual Signal Conditioning: Seamlessly processes both static DC distances (for position tracking) and dynamic AC fluctuations (for high-frequency vibration diagnostics) on a single channel.
        • Reliable 3-Wire Shielded Connectivity: Avoids unreliable screw setups by using traditional, tight-fitting 3-wire shielded cable runs and coaxial connections to prevent loose wiring from triggering false machine trips.
        • High-Precision Linear Scale Factor: Delivers a stable, linear scale factor of 200 mV/mil (7.87 V/mm) across its full 80 mils (2.0 mm) measurement window, making even micro-level rotor displacements easy to detect.
        • Broad Frequency Response Window: Operates at a frequency response range spanning from 0 Hz (DC) all the way up to 10 kHz (600,000 cpm) to accurately capture both sub-synchronous rub defects and high-speed blade passes.
        • Minimized Interchangeability Error Rates: Keeps total linearity errors down to within 0.8 mils when calibrated as a matched system, which dramatically cuts down on nuisance alarms and raises overall diagnostic confidence.
        • Exceptional Signal-to-Noise Ratio: Maintains superior electronic shielding that successfully isolates clean measurement outputs from nearby electromagnetic (EMI) and radio frequency (RFI) plant interference.
        Description
        The Bently Nevada 18745-03 Proximitor Sensor is an industrial-grade device designed to provide accurate non-contact measurement of shaft vibration and position in rotating machinery. It works with proximity probes and extension cables to deliver precise output signals for machinery monitoring and protection.

        With high reliability, wide operating temperature range, and robust construction, it ensures dependable operation in demanding industrial environments. The Bently Nevada 18745-03 offers excellent linearity, stable performance, and compatibility with a range of monitoring systems, making it suitable for critical machinery applications.

        The Bently Nevada 18745-03 is a Proximitor sensor designed for industrial condition monitoring and machinery protection systems. As part of Bently Nevada’s 7200 series, this sensor module delivers accurate non‑contact displacement and vibration measurements by converting the proximity between a target surface and the sensor tip into a reliable electrical signal.

        Built for demanding industrial environments, this Bently Nevada 18745-03 plays a critical role in detecting shaft position and vibration on critical rotating equipment including turbines, compressors, pumps, motors, and generators.
        Alternative Names
        I8745-03 I8745-O3 18745 03 18745-04 21504-00-32-10-02 21505-00-12-05-02 22810-00-10-10-02
        Technical notes
        Technicians must note that the Bently Nevada 18745-03 requires a properly matched 5mm/8mm probe and extension cable system to maintain its calibrated 200mV/mil linear output. Furthermore, all three-wire shielded connections should be confirmed to be securely terminated to prevent signal loss under high-frequency mechanical harmonics.
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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 is the function of the Bently Nevada 18745-03 Proximitor Sensor?
        It measures shaft vibration and position by converting probe signals into usable output.
        How does the system calibration length impact the output signal of the Bently Nevada 18745-03 Proximitor Sensor?
        The Bently Nevada 18745-03 Proximitor Sensor is strictly factory-tuned for a 5-meter total physical configuration. If you pair this module with a probe and cable combination that does not equal exactly 5 meters, the internal tank circuit's impedance will mismatch. This error skews the 200mV/mil scale factor, causing inaccurate voltage readings on your monitoring rack.
        What type of wiring connections does the Bently Nevada 18745-03 Proximitor Sensor utilize, and how do they handle field vibrations?
        The upgraded Bently Nevada 18745-03 Proximitor Sensor features integrated SpringLoc terminal blocks. Unlike traditional screw strips that back out under heavy machinery harmonics, you simply strip the field wire and insert it directly into the spring clamp. This provides a constant mechanical force that guarantees continuous signal flow without spade or ring lugs.
        What are the mandatory safety and compliance certifications fulfilled by the Bently Nevada 18745-03 Proximitor Sensor for hazardous industrial locations?
        The modern XL-packaged Bently Nevada 18745-03 Proximitor Sensor is fully compliant with the ATEX Directive 94/9/EC for safe deployment in potentially explosive atmospheres. Additionally, it carries global hazardous area approvals from major safety bodies including FM, CSA, and BASEEFA, qualifying it for use in intrinsically safe configurations when isolated properly.
        Since the 7200 series is a legacy line, what is the recommended lifecycle and upgrade pathway for the Bently Nevada 18745-03 Proximitor Sensor?
        The Bently Nevada 18745-03 Proximitor Sensor remains fully supported as a high-quality replacement part to keep your existing 7200 physical probe infrastructure up and running. However, for greenfield projects or total system modernizations, Bently Nevada recommends migrating toward the technically superior 3300 XL proximity transducer family.

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