Bently Nevada 990 Series Vibration Transmitter – 990-04-70-02-00

Product Description

The 990-04-70-02-00 vibration transmitter from Bently Nevada is engineered for continuous, high-fidelity monitoring of machinery vibration in demanding industrial environments. Designed as part of the 990 Series, this device converts dynamic mechanical motion into a standardized analog signal for integration with plant-wide condition monitoring and protection systems.

Built with robust electronics and housed in a compact, rugged enclosure, it ensures long-term reliability across extreme temperature conditions while maintaining signal integrity and measurement accuracy.

Technical Specifications  

• Manufacturer: Bently Nevada (a Baker Hughes business)

• Model / Part Number: 990-04-70-02-00

• Series: 990 Vibration Transmitter

• Measurement Type: Absolute vibration (velocity or displacement, depending on configuration)

• Output Signal: 4–20 mA, linearly proportional to RMS or peak vibration amplitude

• Frequency Response: Typically 10 Hz to 1 kHz (configurable based on sensor input)

• Operating Temperature Range: –35 °C to +85 °C

• Power Requirement: 18–30 VDC (loop-powered)

• Mounting: DIN rail or panel mount; compact footprint for confined spaces

• System Compatibility: Native integration with Bently Nevada 3500, System 1, and other Modbus/TCP-enabled platforms

• Enclosure Rating: IP66/NEMA 4X (suitable for washdown and outdoor use)

• Approvals: CE, ATEX (optional), IECEx (optional, depending on variant)

Typical Applications  

• Turbomachinery health monitoring (compressors, turbines, pumps)

• Critical asset protection in oil & gas, power generation, and chemical processing

• Retrofitting legacy machinery with modern predictive maintenance capabilities

FAQ
Q: Does the 990-04-70-02-00 require an external power supply?
A: No—it is loop-powered via the 4–20 mA output circuit, requiring only 18–30 VDC from the monitoring system or PLC.

Q: Can it interface with non-Bently Nevada systems?
A: Yes. The 4–20 mA output is industry-standard and compatible with most DCS, PLC, and SCADA platforms.

Q: How does it differ from the 990-04-70-01-00?
A: The “02” suffix typically denotes a velocity-based output scaled in mm/s RMS, whereas the “01” variant may be configured for displacement (µm) or acceleration (g). Always verify calibration settings per application.