Product Overview

The 990-05-50-01-00 is a high-precision, loop-powered vibration transmitter developed by Bently Nevada to provide seamless machinery protection for original equipment manufacturers (OEMs). This 2-wire device is engineered to interface specifically with the 3300 NSv proximity probe system, converting complex eddy current signals into a standardized 4-20 mA analog output. By translating radial vibration displacement into a linear current loop, it allows industrial operators to integrate critical vibration data directly into Programmable Logic Controllers (PLCs), Distributed Control Systems (DCS), or other plant-wide monitoring architectures without the need for specialized rack-based monitors.

Key Technical Characteristics

The 990-05-50-01-00 transmitter is built for stability and ease of deployment in high-density control environments.

• Model Number 990-05-50-01-00

• Measurement Range 0 to 5 mils peak-to-peak (0 to 125 μm pp)

• System Length 5.0 meters (approx. 16.4 feet)

• Output Signal 4-20 mA DC (proportional to peak-to-peak vibration)

• Input Voltage +12 to +35 Vdc (Loop Powered)

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

• Loop Resistance Maximum 1,000 Ω at 35 Vdc

• Protection Circuitry Integrated current limiting at 23 mA (typical)

• Agency Approvals Standard non-hazardous area configuration (Option -00)

• Terminal Interface Secure screw terminals for field wiring

Industrial Applications and Operational Benefits

The 990-05-50-01-00 transmitter is particularly effective for assets where space is limited or where complex monitoring systems are not economically viable. Because it utilizes the 3300 NSv probe—designed for narrow side-view applications—it excels in the following scenarios:

• Centrifugal Air Compressors Monitoring radial shaft vibration in tight clearances between impellers and bearings.

• Industrial Pump Systems Providing cost-effective, continuous vibration trending for high-service water and process pumps.

• Electric Motors and Fans Implementing automated alarm and shutdown logic via 4-20 mA inputs to protect against unbalance or misalignment.

• OEM Integration Serving as a standardized monitoring component for manufacturers of rotating machinery who require built-in vibration reporting.

• Field Upgrades Simplifying the addition of vibration monitoring to older assets by utilizing existing 4-20 mA control loops.

By delivering a direct analog signal, the 990-05-50-01-00 enables predictive maintenance strategies that reduce unexpected downtime and enhance the operational safety of essential industrial equipment.