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        Bently Nevada 144181-51
        Bently Nevada 144181-51
        Bently Nevada 144181-51
        Bently Nevada 144181-51
        Bently Nevada 144181-51
        Bently Nevada 144181-51
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        • Phone: +86 181 0690 9650
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        • Lifecycle status

          Discontinued / Obsolete by OEM
          Apter Power supplies factory-fresh Bently Nevada 144181-51 hardware, providing maintenance teams with a dependable, current-generation source for critical rotating machinery vibration analysis and protection links.

        144181-51

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        The Bently Nevada 144181-51 is a premium 3300 XL 11mm Proximitor Sensor engineered for non-contact, high-precision proximity and vibration measurements in critical rotating machinery.
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        Ships by Thursday, October 29
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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 144181-51

        • Manufacturer:
          Bently Nevada
        • Part Number:
          144181-51
        • Stock:
          1
        • Input Voltage Range:
          -17.5 Vdc to -26 Vdc (Nominal -24 Vdc)
        • Current Consumption:
          Less than 15 mA (Maximum)
        • Output Scale Factor (ASF):
          3.94 V/mm (100 mV/mil) ± 10% over linear range
        • Linear Range:
          4.0 mm (160mils), starting at approx. 0.5 mm (20 mils) gap
        • System Length (Total):
          5.0 meters
        • Operating Temperature:
          -51°C to +100°C (-60°F to +212°F)
        • Storage Temperature:
          -51°C to +105°C (-60°F to +221°F)
        • Relative Humidity:
          100% condensing, non-submerged
        • Output Impedance:
          50Ω (Nominal)
        • Hazardous Area Approvals:
          ATEX/IECEx (Ex ia, Ex nA), CSA (Class I, Div 1 & 2)
        • Weight:
          0.2 kg
        • Estimated shipping dimensions:
          8.8x3.5x7cm
        • 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 Performance & Efficiency Monitoring & Control

        Features:

        • Extended 4.0 mm Linear Sensing Range
        • Field-Proven API 670 Standardization Compliance
        • Premium RFI/EMI Shielding and Signal Isolation
        The Bently Nevada 144181-51 provides an extended linear range of 160mils, which is double the range of standard 8mm sensor systems. This makes it ideal for larger shafts or applications involving significant axial displacement, such as thrust position tracking and differential expansion, where regular proximity probes would go out of range.

        Engineered to strictly meet API 670 standards, the Bently Nevada 144181-51 guarantees physical, mechanical, and electrical uniformity across your system. Maintenance crews can replace sensors on-the-fly without the hassle of recalibrating individual components, significantly lowering operational complexity and preventing costly plant startup delays.

        The internal circuitry of the Bently Nevada 144181-51 features advanced filtering that insulates delicate proximity signals from heavy industrial electrical noise. This high-grade noise immunity allows the sensor to be mounted directly near variable frequency drives (VFDs) and high-power motors without experiencing signal degradation or false alarms.

        The 144181-51 Bently Nevada 3300 XL 11mm Proximitor Sensor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Bently Nevada 144181-51 3300 XL 11mm 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 144181-51 3300 XL 11mm Proximitor Sensor

        General

        • Manufacturer GE / Bently Nevada
        • Model 144181-51
        • Condition New Original ready stock
        • Product Family 144181-50,144181-50-05
        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.
        • Thrust Bearing Position Monitoring: Crucial for tracking axial movement in massive steam turbines, preventing catastrophic internal rotor-to-stator contact.
        • Large Turbo-Compressor Radial Vibration: Measures relative shaft dynamic motion in high-speed centrifugal compressors to identify unbalance and misalignment.
        • Hydro-Generator Shaft Dissymmetry: Monitors low-speed, large-diameter shafts for orbital eccentricity and structural bowing over an extended measurement gap.
        • Differential Expansion Systems: Tracks the relative thermal growth difference between a turbine's rotating shaft and its stationary casing during startup cycles.
        • Extended Linear Window (160mils): Provides twice the measurement span of standard sensors, allowing greater mechanical tolerances and eliminating frequent sensor re-gapping.
        • Temperature Stability Circuitry: Features specialized internal drift compensation that minimizes measurement variations caused by extreme cyclical ambient temperatures.
        • Low Source Impedance (50Ω): Drives analog voltage signals up to 300 meters (1000 feet) with negligible attenuation, enabling remote control room placement.
        • Optimized Power Profile: Draws minimal operational current from the system rack, reducing thermal buildup inside dense instrument enclosures.
        • 3500 Machinery Protection System Hookup: Integrates directly with standard Bently Nevada monitors for high-speed voting logic and automated machinery trips.
        • Raw AC/DC Condition Monitoring Output: Supplies raw dynamic signals (AC for vibration, DC for gap) simultaneously to allow real-time diagnostic analysis via System 1 software.
        • API 670 Standardized Alerting: Configured for seamless integration into critical safety instrumented systems (SIS) up to SIL-2 loops.
        • Ground-Isolated Base Design: Eliminates ground loop interference when mounted onto metallic machine frames without requiring extra isolation pads.
        Description
        The Bently Nevada 144181-51 utilizes sophisticated eddy current principle to continuously measure static (position) and dynamic (vibration) displacement. By providing an accurate voltage output proportional to the gap between the probe tip and the target shaft, it enables plant operators to detect early-stage mechanical faults before they lead to catastrophic equipment failure.

        Fully compliant with the stringent American Petroleum Institute (API) 670 standard, the Bently Nevada 144181-51 offers seamless component interchangeability. It eliminates the need for tedious bench calibration or matching with specific 11mm probes and extension cables, drastically reducing maintenance downtime and simplifying warehouse inventory management.

        Designed for electrically noisy industrial environments, the Bently Nevada 144181-51 features superior resistance to radio frequency interference (RFI) and electromagnetic interference (EMI). Its internal circuitry prevents signal distortion over long distance runs, ensuring clean, high-fidelity data transmission from the field to the 3500 monitoring rack or distributed control systems (DCS).

        Housed in a robust casing, the Bently Nevada 144181-51 is built to withstand extreme temperatures, moisture, and corrosive atmospheres typical of oil & gas, petrochemical, and power generation facilities. This durability ensures a prolonged service life and consistent measurement accuracy, making it the preferred choice for global plant reliability engineers.
        Alternative Names
        144181 51 I44I8I-51 144181-5I 144181-50 144181-50-05
        Technical notes
        The Bently Nevada 144181-51 is an 11mm Proximitor Sensor calibrated for AISI 4140 steel targets, offering an extended linear range of 4.0 mm (160mils) and a standard scale factor of 3.94 V/mm (100mV/mil). It must be powered by a negative voltage source and properly mounted within a weatherproof housing if exposed to outdoor or highly corrosive industrial environments.
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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 exact output voltage scale factor of the Bently Nevada 144181-51, and how does it interface with a DCS/PLC?
        The Bently Nevada 144181-51 provides an analog voltage output with a standard scale factor of 3.94 V/mm (100mV/mil). Because it outputs a negative voltage proportional to the gap (typically ranging from -2V to -18Vdc), it interfaces seamlessly with Bently Nevada 3500/22M or 3500/42M monitors. For direct connection to standard third-party PLC or DCS analog inputs, a specialized transmitter or an isolated analog input card capable of reading negative voltage ranges is required.
        Does the Bently Nevada 144181-51 require a specific probe calibration, and can I use it with an 8mm probe?
        No, the Bently Nevada 144181-51 is explicitly designed for the 3300 XL 11mm Proximity Transducer System and cannot be cross-paired with 5mm or 8mm probes. It is factory-calibrated for AISI 4140 steel and works strictly with 3300 XL 11mm probes and extension cables. Attempting to use it with different probe diameters or target materials will cause severe scale factor errors and distort your vibration data.
        How do you identify sensor faults and wire connectivity issues directly through the Bently Nevada 144181-51?
        The Bently Nevada 144181-51 supports comprehensive diagnostic depths when connected to a 3500 rack. If the field wiring is open-circuited or short-circuited, the output voltage moves outside the valid linear range (e.g., dropping close to 0V or matching the supply voltage). The monitoring system detects this out-of-bounds voltage and immediately triggers a "NOT OK" diagnostic status, preventing false trips while notifying the instrument engineer of a loop failure.
        What are the hazardous area certifications and safety compliance standards held by the Bently Nevada 144181-51?
        The Bently Nevada 144181-51 is heavily certified for explosive and hazardous environments worldwide. It holds multiple global certifications including ATEX, IECEx, and CSA for Intrinsic Safety (Zone 0/Class I, Div 1 with appropriate zener barriers) and Non-Incendive/Increased Safety (Zone 2/Class I, Div 2 without barriers). This extensive compliance ensures it meets global petrochemical facility safety directives such as IEC 61508.
        What are the environmental mounting limitations for the Bently Nevada 144181-51, and how should it be installed outdoors?
        While the Bently Nevada 144181-51 features a highly resilient operating temperature range from -51°C to +100°C, the coaxial connectors are sensitive to direct liquid submersion and moisture accumulation. For outdoor or corrosive environments, the Bently Nevada 144181-51 must be mounted inside a dedicated, weatherproof NEMA 4X or IP66-rated housing (such as the Bently Nevada 141604 series enclosure) with proper cable glands and connector silicone boots installed.

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