Product Overview

The Bently Nevada 990-10-50-01-05 is a high-performance, loop-powered vibration transmitter designed for continuous machinery protection. This device functions as an integrated Proximitor Sensor, conditioning signals from 3300 NSv proximity probes into a standardized 4-20mA analog output. By providing a direct interface to PLCs, DCS, or SCADA systems, it eliminates the need for expensive rack-mounted monitoring systems in General Purpose equipment applications. It is specifically engineered to provide peak-to-peak vibration measurements, ensuring real-time surveillance of shaft motion in high-speed rotating assets.

Technical Hardware Parameters

This transmitter is built to industrial standards, offering high-fidelity signal processing in a compact, field-mountable form factor.

• Model Number: 990-10-50-01-05

• Input Source: 3300 NSv Proximity Probe and Extension Cable

• Measurement Range: 0 to 250 µm (0 to 10 mils) peak-to-peak (Option -10)

• System Length: Optimized for 5.0 meters / 16.4 feet (Option -50)

• Output Signal: 4 to 20 mA DC proportional to vibration amplitude

• Mounting Options: 35mm DIN-rail clips (Option -01)

• Connector Type: 3-pin MIL-C-5015 top-exit connector (Option -05)

• Diagnostic Interface: Non-isolated "Prox Out" coaxial connector for raw dynamic signal analysis

• Power Supply: +12 to +35 Vdc loop power

• Safety Features: Integrated "Not OK/Signal Defeat" circuit to prevent false trips during sensor failure

• Adjustments: Non-interacting zero and span potentiometers for precise loop calibration

Industrial Applications and Use Cases

The 990-10-50-01-05 is a staple in Turbine Supervisory Instrumentation (TSI) for assets where a dedicated protection rack is not feasible or required.

• Centrifugal Compressors: Continuous monitoring of radial shaft vibration to detect unbalance or aerodynamic instability.

• Industrial Pumps and Motors: Early detection of bearing wear, shaft misalignment, and mechanical looseness through 4-20mA trending.

• OEM Machinery Packages: Integrated as a standard vibration sensing solution for equipment manufacturers across oil, gas, and power sectors.

• Maritime Applications: Certified for use on cooling tower fans and secondary shipboard machinery where ABS/maritime approvals are mandatory.

• Hazardous Area Monitoring: Safe deployment in volatile environments with ATEX Zone 0/2 and CSA Division 2 compliance.