Bently Nevada 991-01-XX-01-00 displacement monitoring

Engineering Purpose

The 991-01-XX-01-00 is a loop-powered transmitter specifically calibrated for axial displacement (thrust) monitoring. It serves as a direct link between a 3300 NSv proximity probe and a control system, converting shaft position into a standard 4-20 mA signal. This model is essential for tracking thrust bearing wear and preventing internal rotor contact in turbines, motors, and generators.

Technical Data Summary

• Component Type: 2-Wire Thrust Transmitter

• System Compatibility: 3300 NSv Proximity Probe

• Part Number: 991-01-XX-01-00

• Linear Range: 0.25 to 1.65 mm (10 to 65 mils)

• Scale Factor: 7.87 mV/µm (200 mV/mil) $\pm$6.5% typical

• System Length: Configurable (XX = 50 for 5.0m or 70 for 7.0m)

• Mounting Type: 35 mm DIN rail clips (01)

• Agency Approval: Standard / Not Required (00)

• Power Supply: +12 to +35 Vdc

Decoding the Model Configuration

• 991: Bently Nevada 991 series axial displacement/thrust platform.

• 01: Full-Scale Option. Standard range configuration for thrust monitoring.

• XX: System Length Option. (Must match the 5.0m or 7.0m total probe/cable assembly).

• 01: Equipped with 35 mm DIN rail clips for standardized cabinet installation.

• 00: Standard version for non-hazardous or Zone 2 / Division 2 locations.