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Bently Nevada 990-04-70-02-00 990 Series 4-20mA Vibration Transmitter

Product Description

The Bently Nevada 990-04-70-02-00 is a high-performance, 2-wire vibration transmitter designed to provide continuous machinery protection by converting proximity probe signals into a standardized 4–20 mA analog output. Part of the 990 Series, this integrated transmitter eliminates the need for separate rack-mounted monitors, allowing for direct interface with PLCs, DCS, or SCADA systems. This specific configuration is optimized for high-fidelity vibration monitoring in critical rotating assets, ensuring real-time data for predictive maintenance.

The 990-04-70-02-00 follows a precise configuration logic: the 04 code signifies a full-scale measurement range of 0–4 mils pp (0–100 µm pp), the 70 designates a 7.0-meter system length calibration, and the 02 indicates a panel-mount configuration (typically without the DIN rail clips found on the 01 variant). Engineered to withstand the rigors of industrial environments, it features a rugged enclosure rated for extreme temperatures and provides a linear output proportional to peak-to-peak displacement. This transmitter is a primary choice for balancing high accuracy with simplified system architecture in API 670 compliant applications.

Technical Specifications

Hardware parameters and electrical ratings for the 990-04-70-02-00:

Parameter Specification Details
Model Number 990-04-70-02-00
Manufacturer Bently Nevada (Baker Hughes)
Transmitter Series 990 Vibration Transmitter Series
Full-Scale Range 0–4 mils pp (0–100 µm pp)
System Length 7.0 Meters (23.0 Feet)
Output Signal 4–20 mA DC (Linearly proportional)
Input Compatibility 3300 NSv Proximity Probe + Extension Cable
Power Requirement 18–30 VDC (Loop-powered)
Frequency Response 10 Hz to 1,000 Hz
Operating Temperature –35 °C to +85 °C
Storage Temperature –51 °C to +100 °C
Enclosure Rating IP66 / NEMA 4X
Mounting Panel Mount (02 configuration)
Certifications CE, UL, cUL, API 670 compliant

 

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