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        990-08-XX-01-00 MOD:283278-01

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        The Bently Nevada 990-08-XX-01-00 MOD:283278-01 is a high‑performance 2‑wire vibration transmitter from the industry‑proven 990 Series of Bently Nevada machinery condition monitoring products, designed to convert raw vibration signals into reliable standardized outputs for industrial control systems.
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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 990-08-XX-01-00 MOD:283278-01

        • Manufacturer:
          Bently Nevada
        • Part Number:
          990-08-XX-01-00 MOD:283278-01
        • Product Family:
          990 Vibration Transmitter
        • Full-scale Range:
          0-10 mils pp (0-250 μm pp)
        • System Length:
          5.0 meters (16.4 feet)
        • Mounting:
          35 mm DIN rail clips
        • Output Signal:
          4 to 20 mA
        • Input Compatibility:
          3300 NSv proximity probe
        • Agency Approvals:
          CSA Division 2, ATEX Zone 0, ATEX Zone 2, ABS maritime
        • Weight:
          0.43 kg
        • Estimated shipping dimensions:
          10 × 7.4 × 5.3 cm
        • 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 Communication Product Applications

        Features:

        • Interface Between the Machine Vibration Source and 4-20 mA Control Loop
        • Combines Capability of Eddy Current Vibration Sensing with Loop-Powered Signal Transmission
        • Operates in Conjunction with the NSv Series Probes and Standard PLC/DCS Systems
        The 990-08-XX-01-00 MOD:283278-01 operates as the Universal Vibration Transmitter in industrial machinery applications, providing reliable 4-20 mA vibration signals to all control systems within the plant. It continuously accepts input from 3300 NSv proximity probes (0-8 mil pp, 5 Hz to 6,000 Hz) and converts these mechanical vibration signals to proportional current loop outputs for seamless integration with PLCs and DCSs. Seamless signal transmission is standard with the 99008, however using an optional Extended Cable Configuration will allow installation flexibility up to 7.0 meters in the event of a remote probe location. The 99008 has made improvements in several areas over previous vibration transmitter designs in addition to incorporating universal 2-wire loop-powered capability within hazardous area installations.

        The 99008 provides essential vibration monitoring functions common to the entire machine train, and is a critical component of the protection path, directly affecting the proper, normal operation of the overall machinery system. One or two 99008 transmitters are required per measurement point depending on the desired redundancy level. The 99008 occupies only a single DIN rail mounting position in the panel and is always located in the dedicated transmitter slots (standard 35mm DIN rail, far left position in the monitoring chain).

        For Dual Redundant Vibration Monitoring applications, the 990 System requires a second 99008 transmitter module installed in the redundant measurement position. In addition to standard single transmitter operation, the redundant configuration also performs automatic signal validation. The 990 dual transmitter configuration executes failover using the internal comparison circuitry specified in the transmitter options. Using this method, the redundant vibration system continually monitors the health of both transmitters. If the system detects that the primary transmitter is no longer providing stable output (outside configured vibration/tolerance levels), it will automatically transfer the control signal to the secondary transmitter and place an event in the System Event List.

        The 990-08-XX-01-00 MOD:283278-01 Bently Nevada high‑performance 2‑wire vibration transmitter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        Bently Nevada 990-08-XX-01-00 MOD:283278-01 Standard Vibration Transmitter Manuals, Datasheets, Drivers, 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 990‑08‑XX‑01‑00 MOD:283278‑01 Vibration Transmitter Specs

        General

        • Manufacturer GE / Bently Nevada
        • Model 990‑08‑XX‑01‑00 MOD:283278‑01
        • Condition New Original ready stock
        • Product Family 990-08-XX-02-00 MOD:283278-01 ,990-08-XX-01-05 MOD:283278-01,991-08-XX-01-00 MOD:288865-01
        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.
         
        • PROX OUT (Dynamic Signal Interface): A coaxial connector on the top of the transmitter allows for the output of unisolated dynamic sensor signals.
        • Loop Verification (Test Input): Equipped with a test input pin, it allows for quick verification of the 4-20 mA loop output's functionality using a function generator to simulate signals.
        • Status Monitoring (Not OK/Signal Defeat): Includes a built-in "Not OK" circuit. This circuit prevents erroneous high output signals or false alarms if the sensor probe is damaged or the connection is loose.
         
        • Signal type: Standard 4-20 mA DC current.
        • Correspondence: The current value linearly corresponds to the machine's vibration amplitude (e.g., 4mA corresponds to 0 vibration, 20mA corresponds to full scale).
        • Receiver: Analog input card directly connected to a PLC, DCS, or SCADA system.
        • Solenoid Valve Circuit Monitoring: The TRPG board provides a negative 125V DC power supply to the tripped solenoid valve. It features nine relays, typically grouped in a "2-out-of-3" logic for fault-tolerant protection.
        • Fault Detection and Isolation: The system continuously monitors relay status, feedback signals, and I/O communications. Diagnostic alarms are triggered upon detecting memory test failures, invalid messages, or communication reception errors.
        • Flame Monitoring and Diagnosis: In gas turbine applications, the TRPG board monitors the Geiger-Mueller flame detector. It can diagnose whether photodetection is obstructed by carbon buildup or other impurities.
        • Hardware Protection: The board is equipped with metal oxide varistors (MOVs) as current suppressors to protect the circuitry from voltage surges.
        View as PDF
        Description
        It is engineered primarily for OEMs and machinery OEM applications—such as centrifugal air compressors, small pumps, motors, and fans—where a simple yet accurate vibration signal is required for process control and protection logic.

        As a compact loop‑powered transmitter, the 990‑08‑XX‑01‑00 accepts input from a matched 3300 NSv proximity probe and extension cable, conditioning the signal into a 4–20 mA proportional output that represents peak‑to‑peak vibration amplitude, which can be fed directly into a PLC, DCS, or other control and monitoring systems. Its design supports continuous monitoring in industrial environments, enabling clear and consistent vibration trending for condition‑based maintenance programs.

        Constructed with durable materials and offering rugged environmental tolerance, the 990 transmitter provides reliable performance under variable conditions while maintaining signal integrity. 

        Typical features of the transmitter include 4–20 mA industry‑standard output, 2‑wire loop‑powered operation, robust stainless‑steel electronics housing, and compatibility with standard proximity probe sensors. It supports effective machinery health assessment, early warning of mechanical issues, and seamless integration into existing control infrastructures.

        Alternative Names
        990-08-XX-02-00 MOD:283278-01 990-08-XX-01-05 MOD:283278-01 991-08-XX-01-00 MOD:288865-01
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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 type of output does the 990-08-XX-01-00 MOD:283278-01 provide?
        The transmitter provides a 4–20 mA loop-powered output proportional to the vibration amplitude measured by the connected proximity probe.
        What sensors are compatible with this transmitter?
        It is compatible with Bently Nevada 3300 NSv proximity probes and other standard 8 mm 3300 series probes for accurate vibration and displacement monitoring.
        What are the environmental tolerances of the 990-08-XX-01-00 MOD:283278-01?
        The unit is designed for industrial conditions, featuring a rugged housing that maintains signal integrity under variable temperatures, vibration, and electrically noisy environments.

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