The Bently Nevada 990-05-XX-03-01 is a high-performance vibration transmitter. This device integrates a Proximitor Sensor into a compact unit. It converts signal input from a proximity probe into a 4-20 mA output. This current loop signal represents the peak-to-peak vibration of the target machinery. The transmitter specifically works with the 3300 NSv proximity probe series. This combination ensures accurate monitoring of rotating shafts in tight mechanical spaces.
Technical Performance and Specifications
This transmitter operates on a standard 2-wire 4-20 mA loop configuration. It provides a linear output across its full measurement scale. The “MOD:168251-01” designation indicates a specific modification or hardware revision. Bently Nevada designs these units for high reliability in continuous-duty applications.
- Measurement Range: 0 to 5 mils peak-to-peak (0-125 μm)
- Output Signal: 4-20 mA DC proportional to vibration
- Target Compatibility: Primarily 3300 NSv Proximity Probes
- Power Requirements: +12 to +35 Vdc supply voltage
- Frequency Response: 5 Hz to 10 kHz (±3 dB)
- Environmental Rating: IP20 enclosure protection
Industrial Applications and Mounting
Facility engineers utilize the 990 series for centrifugal compressors and small pumps. It effectively monitors fluid-film bearing machines where space is limited. The unit features a DIN-rail compatible housing for easy cabinet installation. This design replaces larger, more expensive rack-mounted monitoring systems in many scenarios. It provides a direct interface to Distributed Control Systems (DCS) or PLCs. This connectivity allows for immediate machine protection and automatic shutdown protocols.
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