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990-05-50-02-05

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The Bently Nevada 990-05-50-02-05 is a loop-powered vibration transmitter designed to deliver a proportional 4–20 mA vibration signal based on input from a 3300 NSv proximity probe system. It is built for compact machinery monitoring applications requiring simplified vibration output for control systems.
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Technical specifications for 990-05-50-02-05

  • Manufacturer:
    Bently Nevada
  • Part Number:
    990-05-50-02-05
  • Product Family:
    990 Vibration Transmitter
  • Product Type:
    Vibration Transmitter
  • Full-scale Option:
    0-5 mils pp (0-125 μm pp)
  • System Length Option:
    5.0 meters (16.4 feet)
  • Mounting Option:
    Bulkhead screws
  • Agency Approval Option:
    CSA Division 2, ATEX Zone 0, ATEX Zone 2 and includes ABS maritime approval
  • Transducer tip material:
    Polyphenylene sulfide (PPS).
  • Transducer case material:
    AISI 303 or 304 Stainless Steel (SST).
  • Operating temperature:
    -35°C to +85°C (-31°F to +185°F).
  • Storage temperature:
    -52°C to +100°C(-62°F to +212°F).
  • Power:
    Requires +12 to +35 Vdc input at the transmitter terminal.
  • Current limiting:
    23 mA typical.
  • Weight:
    0.44 kg
  • Estimated shipping dimensions:
    7.3x5.2x9.8cm
  • Tariff Code:
    8431499900
  • 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 Core Value Ease of Use Application

Features:

  • Provides a loop-powered 4–20 mA vibration output derived from proximity probe input for simplified monitoring integration.
  • Includes integrated signal conditioning with adjustable zero/span and built-in diagnostic access via PROX OUT interface.
  • Supports harsh environments with sealed construction, wide temperature range, and multiple industrial certifications.
The Bently Nevada 990-05-50-02-05 is designed for industrial systems where simplified vibration monitoring is required without full diagnostic complexity. The Bently Nevada 990-05-50-02-05 operates as a two-wire loop-powered device, making it suitable for compact machine installations where wiring and space are limited. It processes vibration signals from compatible proximity probes and converts them into standardized output values. This design allows control systems to receive stable vibration feedback for basic protection functions.

In applications where centrifugal compressors or small rotating machines are used, the Bently Nevada 990-05-50-02-05 provides a practical signal conversion solution. The system supports peak-to-peak vibration representation and delivers a proportional 4–20 mA signal to downstream control equipment. It also includes adjustable configuration elements such as zero and span potentiometers for loop calibration. The integrated design reduces the need for external signal conditioning modules.

The Bently Nevada 990-05-50-02-05 is built for environments requiring reliable operation under varying conditions, including humidity and temperature fluctuations. Its construction supports both bulkhead and DIN-rail installation methods for flexible mounting. The unit also provides diagnostic signal access through its PROX OUT interface for maintenance and verification purposes. Overall, it serves as a compact vibration transmission solution for OEM and industrial machinery systems.

The 990-05-50-02-05 Bently Nevada Vibration Transmitter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 990-05-50-02-05 Vibration 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 990-05-50-02-05 Vibration Transmitter Specs

General

  • Manufacturer GE / Bently Nevada
  • Model 990-05-50-02-05
  • Condition New Original ready stock
  • Product Family 990-04-50-02-05,990-08-50-02-05,990-10-50-02-05
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.
  • System Simplification: Direct 4-20mA signal output eliminates the need for intermediate converters for connection to PLC or DCS systems, significantly reducing system complexity.
  • Status Indication: Features a "non-OK" status detection function. When a probe or cable malfunctions, the current automatically drops below 3.6mA, facilitating system identification and preventing false alarms.
  • Isolation Protection: The design incorporates power and signal isolation mechanisms, effectively suppressing common industrial ground loop interference and electromagnetic noise, ensuring data accuracy.
  • Quick Diagnostics: The enclosure provides a dedicated buffered output connector, allowing maintenance personnel to directly connect to portable analyzers for spectrum diagnostics.
  • Flexible Installation: A compact DIN rail mounting design supports high-density layouts, greatly saving internal control cabinet space.
  • Convenient Commissioning: Supports on-site adjustment of "zero" and "full scale" positions, compensating for signal offsets caused by mechanical installation errors or material differences.
  • Environmental Adaptability: Features a robust, sealed housing design, enabling long-term stable operation in industrial indoor environments with oil mist, high humidity, or corrosive gases.
  • Electrical Compatibility: Its rationally distributed terminal blocks support standard industrial wiring and exhibit strong tolerance to fluctuations in external DC power supply voltage.
  • Centrifugal Machinery: Used for real-time monitoring of radial vibration (shaft vibration) in rotating equipment such as centrifugal pumps, fans, and motors.
  • Critical Equipment Protection: Provides economical and reliable vibration shutdown protection for small and medium-sized rotating machines that lack dedicated unit protection systems (such as the 3500 system).
  • Remote Monitoring: Suitable for geographically dispersed pump stations or unattended stations, enabling long-distance monitoring via a 4-20mA signal.
  • Shaft Displacement Measurement: Configurable for monitoring changes in axial displacement of rotating shafts caused by load fluctuations or thrust bearing wear.
Description
The Bently Nevada 990-05-50-02-05 is a two-wire vibration transmitter intended primarily for OEM applications such as centrifugal air compressors, small pumps, motors, and fans. It works with a 3300 NSv proximity probe and matching extension cable to convert mechanical vibration into a usable electrical signal for control systems.

The Bently Nevada 990-05-50-02-05 conditions the measured vibration into peak-to-peak engineering units and outputs a standard 4–20 mA signal. This allows machinery protection systems to receive a continuous proportional vibration value for monitoring and basic alarming functions.

Designed with integrated signal conditioning, the Bently Nevada 990-05-50-02-05 includes features such as non-isolated PROX OUT and COM terminals, zero and span adjustment potentiometers, and a test input for loop verification. It also incorporates a Not OK/Signal Defeat function to help manage abnormal probe or connection conditions.

The Bently Nevada 990-05-50-02-05 supports installation flexibility with DIN-rail or bulkhead mounting options and is constructed with potted housing for high-humidity environments. Its operating temperature range is -35°C to +85°C, and it is powered by a +12 to +35 Vdc loop supply with typical current limiting at 23 mA.

Additionally, the Bently Nevada 990-05-50-02-05 provides a PROX OUT signal for diagnostic access when needed, although isolation is recommended via an external interface such as the 990/991 Test Adapter for proper equipment protection and signal integrity.
Alternative Names
990-05-50-02-00 990-05-50-02-01 990-05-50-01-05 990-05-50-03-05
Technical notes
Bently Nevada 990-05-50-02-05 is a two-wire loop-powered vibration transmitter with 4–20 mA output, full-scale 0–5 mils pp (0–125 μm pp), 5.0 m system length, bulkhead screw mounting, CSA Division 2 and ATEX Zone 0/2 approvals with ABS maritime certification, PPS transducer tip, stainless steel (AISI 303/304) case, operating temperature -35°C to +85°C, storage -52°C to +100°C, and +12 to +35 Vdc power input with 23 mA current limiting.
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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.
Why is the Bently Nevada 990-05-50-02-05 used in OEM machinery?
It is designed for simplified vibration monitoring in compact rotating equipment such as pumps and compressors.
What compatibility does the Bently Nevada 990-05-50-02-05 support?
It works with the 3300 NSv proximity probe and matching extension cable systems.
How is the 990-05-50-02-05 installed in industrial systems?
It supports both DIN-rail clips and bulkhead screw mounting options.
Why is PROX OUT important in the Bently Nevada 990-05-50-02-05?
It provides a non-isolated dynamic signal output for diagnostic testing purposes.