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        991-25-50-01-05

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        1001 reviews ｜ Need a Specific Revision?
        The 991-25-50-01-05 thrust transmitter measures the axial displacement of rotating machinery, providing accurate and stable measurement results. It is suitable for detecting the shaft motion of turbines, compressors, and pumps.
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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.
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        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
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        Technical specifications for 991-25-50-01-05

        • Manufacturer:
          Bently Nevada
        • Part Number:
          991-25-50-01-05
        • Product Family:
          991 Thrust Transmitter
        • Full-scale:
          25-0-25 mils
        • System Length:
          5.0 meters (16.4 feet)
        • Mounting Option:
          35 mm DIN-rail clips
        • Output Signal:
          4–20 mA analog signal proportional to axial displacement
        • Power Supply:
          2-wire, loop-powered device
        • Current Limiting:
          23 mA typical
        • Agency Approval:
          CSA Division 2, ATEX Zone 0, ATEX Zone 2 and includes ABS maritime approval
        • Weight:
          0.44 kg
        • Estimated shipping dimensions:
          10x7.3x6cm
        • 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 Use Cases Installation & Integration Operating Environment

        Features:

        • Interface Between Rotating Machinery and Control Systems
        • Combines Capability of Axial Displacement Measurement with Flexible Installation Support
        • Operates in Conjunction with Distributed Control Systems (DCS) and Programmable Logic Controllers (PLC)
        The 991-25-50-01-05 operates as the Thrust Transmitter in rotating machinery applications, providing reliable axial displacement data for critical industrial monitoring systems. It continuously measures shaft movement within a range of 25-0-25 mils and transmits accurate position signals through its 5.0-meter (16.4 feet) system length to support real-time monitoring of turbines, compressors, and pumps. Seamless signal transmission is standard with the 991-25-50-01-05, and its flexible system length configuration allows optimal sensor positioning even when control systems must be located at a distance from the measurement point. The 991-25-50-01-05 has made improvements in several areas over previous thrust monitoring designs in addition to incorporating hazardous area certifications within demanding industrial environments.

        The 991-25-50-01-05 provides essential thrust monitoring functions common to critical rotating equipment, and is a critical component of the protection path, directly affecting the proper, normal operation of the overall machinery system. One 991-25-50-01-05 thrust transmitter is required per measurement point depending on the desired monitoring coverage. The 991-25-50-01-05 features compact 35 mm DIN-rail mounting clips for quick installation and is always positioned to ensure optimal axial displacement detection.

        For hazardous environment applications, the 991-25-50-01-05 Thrust Transmitter requires proper installation in compliance with its certified protection ratings. In addition to standard measurement operation, the certified configuration also ensures safe performance in explosive atmospheres. The 991-25-50-01-05 executes reliable monitoring using the internal circuitry specified in the transmitter specifications. Using this method, the thrust monitoring system continually tracks axial position variations. If the system detects that the shaft displacement is approaching critical limits (outside configured tolerance levels), it will automatically alert operators and enable preventive action to avoid mechanical damage or failure.

        The 991-25-50-01-05 Thrust Transmitter with CSA Division 2, ATEX Zone 0, ATEX Zone 2, and ABS maritime approval may still be available for purchase and support from authorized distributors beyond standard product lifecycle transitions by the manufacturer (OEM).

        Bently Nevada 991-25-50-01-05 Thrust Transmitter 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 991-25-50-01-05 Thrust Transmitter

        General

        • Manufacturer GE / Bently Nevada
        • Model 991-25-50-01-05
        • Condition New Original ready stock
        • Product Family 991-25-50-01-01,991-25-50-01-00
        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.
        • Centrifugal Air Compressors: Frequently used by OEMs to monitor axial displacement in compressors equipped with fluid-film thrust bearings.
        • Small Rotating Machinery: Ideal for small pumps, motors, and fans where continuous monitoring of shaft thrust is required to prevent bearing damage.
        • Skid-Mounted Packages: Suitable for compact equipment packages where space is limited and a direct 4–20 mA output is needed for a PLC or DCS.
        • Trend Monitoring: Provides a simple method for trending thrust readings to detect gradual machinery wear.
        • Transducer Compatibility: Integrates exclusively with Bently Nevada 3300 NSv proximity probes and matching 5m or 7m extension cables.
        • System Wiring: Operates as a 2-wire, loop-powered device, drawing power directly from the control system (typically +12 to +35 Vdc).
        • Mounting Options: The -01 option in the part number indicates 35 mm DIN-rail clips for standard industrial rail mounting, though bulkhead mounting is also supported.
        • Diagnostic Port: Includes a "PROX OUT" coaxial connector for connecting an oscilloscope or analyzer to view dynamic vibration signals. An isolation interface is strongly recommended if using AC-powered test equipment.
        • Control System Integration: Connects directly to PLC, DCS, or SCADA systems. It includes non-interacting zero and span potentiometers for loop adjustments.
        • Humidity: Potted construction allows for up to 100% condensing humidity (non-submerged), protecting internal electronics.
        • Hazardous Areas: Designed for use in Non-Hazardous, Zone 2, or Division 2 locations depending on specific agency approvals.
        • Ingress Protection: Typically rated IP54 for resistance against dust and water splashes.
        • Scale Stability: Accuracy is maintained within ±1.5% of full scale. Temperature stability for the scale factor is rated from 0°C to +70°C.
        • Operating: -35°C to +85°C (-31°F to +185°F).
        • Storage: -51°C to +100°C (-60°F to +212°F).
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        Description
        The 991-25-50-01-05 Thrust Transmitter is a precision monitoring device designed to measure axial displacement in rotating machinery, providing reliable thrust position data for critical industrial applications. With a full-scale range of 25-0-25 mils, this transmitter delivers accurate and stable measurements, making it suitable for detecting shaft movement in turbines, compressors, and pumps. This thrust transmitter is specifically engineered to handle the challenge of monitoring axial position variations, helping operators identify abnormal movement and prevent potential mechanical damage or failure.

        The 991-25-50-01-05 Thrust Transmitter features a system length of 5.0 meters (16.4 feet), allowing flexible installation across various equipment layouts while maintaining signal integrity. This configuration ensures consistent performance even in complex industrial environments where sensors must be positioned at a distance from control systems. It is particularly effective in applications where precise alignment and real-time displacement feedback are required, such as in steam turbines and centrifugal compressors, where axial thrust must be carefully controlled to avoid excessive wear on bearings.

        Designed for ease of installation, the 991-25-50-01-05 Thrust Transmitter includes 35 mm DIN-rail mounting clips, enabling quick and secure integration into standard industrial control panels. This mounting option simplifies deployment in distributed control systems (DCS) and programmable logic controller (PLC) cabinets, reducing installation time and improving maintenance efficiency. The product is well-suited for automation environments where compact and standardized mounting solutions are essential.

        The 991-25-50-01-05 Thrust Transmitter is built to operate in hazardous and demanding environments, holding certifications such as CSA Division 2, ATEX Zone 0, ATEX Zone 2, and ABS maritime approval. These approvals ensure safe and reliable operation in explosive atmospheres and marine applications, including offshore platforms and shipboard machinery systems. This thrust transmitter is specifically designed to address the challenges of operating in harsh conditions, ensuring continuous monitoring and enhancing equipment protection in industries such as oil and gas, power generation, and marine engineering.
        Alternative Names
        991 25 50 01 05 991-25-50-01-01 991-25-50-01-00 991-25-50-02-05 991-25-50-03-05
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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 primary function of the 991-25-50-01-05 Thrust Transmitter?
        The 991-25-50-01-05 Thrust Transmitter is a precision monitoring device designed to measure axial displacement in rotating machinery, providing reliable thrust position data for critical industrial applications. With a full-scale range of 25-0-25 mils, the 991-25-50-01-05 delivers accurate and stable measurements, making it suitable for detecting shaft movement in turbines, compressors, and pumps.
        What is the measurement range of the 991-25-50-01-05, and what applications is it suitable for?
        The 991-25-50-01-05 features a full-scale range of 25-0-25 mils. The 991-25-50-01-05 is particularly effective in applications where precise alignment and real-time displacement feedback are required, such as in steam turbines and centrifugal compressors, where axial thrust must be carefully controlled to avoid excessive wear on bearings.
        What mounting option does the 991-25-50-01-05 offer?
        The 991-25-50-01-05 includes 35 mm DIN-rail mounting clips, enabling quick and secure integration into standard industrial control panels. This mounting option simplifies deployment in distributed control systems (DCS) and programmable logic controller (PLC) cabinets, reducing installation time and improving maintenance efficiency for the 991-25-50-01-05.
        What operational benefits can users expect from the 991-25-50-01-05?
        The 991-25-50-01-05 helps operators identify abnormal axial movement and prevent potential mechanical damage or failure. Specifically engineered to address the challenges of operating in harsh conditions, the 991-25-50-01-05 ensures continuous monitoring and enhances equipment protection in industries such as oil and gas, power generation, and marine engineering.

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