Bently Nevada 990-04-50-03-00 vibration transmitter, overall view
Bently Nevada 990-04-50-03-00 vibration transmitter, terminal block and wiring connections
Bently Nevada 990-04-50-03-00 vibration transmitter, product label and enclosure
Bently Nevada 990-04-50-03-00 vibration transmitter, overall view
Bently Nevada 990-04-50-03-00 vibration transmitter, terminal block and wiring connections
Bently Nevada 990-04-50-03-00 vibration transmitter, product label and enclosure
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990-04-50-03-00

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The 990-04-50-03-00 is a 990 Vibration Transmitter featuring a 0-4 mils pp (0-100 μm pp) full-scale range with a 5.0 meter (16.4 feet) system length. This two-wire, loop-powered device mounts via DIN clips and screws and requires no agency approvals.
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Technical specifications for 990-04-50-03-00

  • Manufacturer:
    Bently Nevada
  • Part Number:
    990-04-50-03-00
  • Product Family:
    990 Vibration Transmitter
  • Product Type:
    990 Vibration Transmitter
  • Full-Scale Range:
    0-4 mils pp (0-100 μm pp)
  • System Length:
    5.0 meters (16.4 feet)
  • Mounting:
    DIN clips and screws
  • Power Supply:
    Two-wire, loop-powered
  • Output Signal:
    Proportional 4-20 mA
  • Agency Approval:
    Not required
  • Key Benefit:
    Model 990-04-50-03-00 delivers a proportional 4-20 mA signal for basic alarming while offering a PROX OUT connector for diagnostic access when used with the recommended 990/991 Test Adapter for signal isolation.
  • Weight:
    0.5 kg
  • Estimated shipping dimensions:
    10x7.5x5.6cm
  • Tariff Code:
    9031809090
  • 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 Application Operating Environment Monitoring and Control

Features:

  • The 990-04-50-03-00 features a two-wire, loop-powered design for simple integration into control systems.
  • This model includes a PROX OUT coaxial connector providing a non-isolated dynamic transducer signal for diagnostic access.
  • The 990-04-50-03-00 offers DIN clip and screw mounting for easy installation in control panels.
The 990-04-50-03-00 provides essential vibration trending functions common to the 990 series, and is a practical solution for applications where full diagnostic capability is not required. It features a PROX OUT coaxial connector that delivers a non-isolated dynamic transducer signal for machinery diagnostics. When using the 990-04-50-03-00 with AC-powered test equipment, the 990/991 Test Adapter is strongly recommended to condition, invert, and isolate the PROX OUT signal for oscilloscopes and analyzers while preserving industry-standard signal polarity conventions.

For applications requiring cost-effective vibration monitoring, the 990-04-50-03-00 offers a 0-4 mils pp full-scale range with a 5.0 meter system length. However, it has limitations compared to continuous monitoring systems. The 4-20 mA signal from the 990-04-50-03-00 cannot determine vibration phase, and advanced monitor functions such as gap alarms, phase alarms, Timed OK channel defeat, Danger Bypass, and Trip Multiply are not supported. PLCs attached to this transmitter can only provide peak-to-peak trending data.

The 990-04-50-03-00 solves the pain point of providing cost-effective vibration measurement for OEM equipment where full diagnostic capability is not necessary. While the transmitter does not capture dynamic vibration signals for diagnostics during alarms, the PROX OUT connector enables diagnostic access when used with the recommended isolation interface. The 990-04-50-03-00 ensures reliable general vibration trending while maintaining compatibility with plant control systems through its standard 4-20 mA output.

The 990-04-50-03-00 Bently Nevada 990 Vibration Transmitter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

Bently Nevada 990-04-50-03-00 990 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 990-04-50-03-00 990 Vibration Transmitter Specs

General

  • Manufacturer GE / Bently Nevada
  • Model 990-04-50-03-00
  • Condition New Original ready stock
  • Product Family 990-05-50-03-00,990-10-50-03-00,990-04-70-03-00
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.
  • Small Rotary Machinery: Widely used in centrifugal air compressors, small pumps, motors, and fans.
  • Confined Space Monitoring: Especially suitable for installation in confined spaces with extremely limited bearing housing space due to its compatibility with the 3300 NSv (Narrow Side View) probe.
  • General Industrial Monitoring: Suitable for preventative maintenance in industries such as oil, natural gas, petrochemicals, and wastewater treatment.
  • Humidity: Potted design allows for up to 100% condensation, but it cannot be submerged in liquids.
  • Mechanical Endurance: Designed to withstand a 10 g half-sine wave impact (11 ms) and specific vibration interference.
  • Signal Output: Outputs a 4-20 mA proportional signal to a PLC (Programmable Logic Controller) or DCS (Distributed Control System) for alarm execution and logical protection (such as automatic shutdown).
  • Diagnostic Interface (Prox Out): Features a non-isolated dynamic signal output (BNC connector or terminal block) providing dynamic vibration waveforms and gap voltages for technicians to use an oscilloscope or data acquisition instrument for deeper mechanical fault diagnosis.
  • Not OK / Signal Shielding Circuit: When the probe is damaged or the connection is loose, the output current drops to < 3.6 mA to prevent false alarms.
Description
The 990-04-50-03-00 operates as a two-wire, loop-powered vibration transmitter designed for measuring general vibration levels and providing overall trending data in industrial applications. It features a 0-4 mils pp (0-100 μm pp) full-scale range with a 5.0 meter (16.4 feet) system length, mounting via DIN clips and screws for easy installation. 

The 990-04-50-03-00 offers a PROX OUT coaxial connector that provides a non-isolated dynamic transducer signal for machinery diagnostics. This signal can be connected directly to battery-powered or isolated test equipment to diagnose machinery problems. 

The 990-04-50-03-00 is a practical solution for applications requiring general vibration level measurement and trending. However, it has limitations compared to continuous monitoring systems, as it does not capture dynamic vibration signals for diagnostics during alarms. 

The 990-04-50-03-00 solves the pain point of providing basic vibration trending at a lower cost point for OEM applications where full diagnostic capability is not required. While PLCs attached to the 990-04-50-03-00 can only provide peak-to-peak trending data, the PROX OUT connector enables diagnostic access when an isolation interface is used.
Alternative Names
990-05-50-03-00 990-10-50-03-00 990-04-70-03-00 990-04-50-01-00
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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.
What is the primary application for the 990-04-50-03-00 vibration transmitter?
The 990-04-50-03-00 is designed for general vibration measurement and trending on OEM equipment such as pumps, motors, and fans where cost-effective basic alarming is sufficient without full diagnostic capability.
How does the PROX OUT connector on the 990-04-50-03-00 support diagnostics?
The PROX OUT provides a non-isolated dynamic transducer signal that can be connected to battery-powered or isolated test equipment, or used with the recommended 990/991 Test Adapter for AC-powered oscilloscopes and analyzers.
What are the limitations of using the 990-04-50-03-00 compared to a full monitoring system?
The 4-20 mA signal cannot determine vibration phase, and advanced functions like gap alarms, phase alarms, Danger Bypass, and Trip Multiply are not supported. It only provides peak-to-peak trending data.
What accessory is recommended for the 990-04-50-03-00 and why?
The 990/991 Test Adapter is strongly recommended to condition, invert, and isolate the PROX OUT signal for use with AC-powered test equipment while preserving industry-standard conventions for signal polarity.

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