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.