Product Overview

The Bently Nevada 990-04-50-03-00 is a high-performance, standalone vibration transmitter designed to provide continuous machinery protection for rotating assets. This device functions by interfacing directly with a 3300 NSv proximity probe system, converting the complex eddy current signals into a standardized 4-20 mA analog output. Engineered specifically for Original Equipment Manufacturers (OEMs), it facilitates the integration of vibration monitoring into existing PLC, DCS, or SCADA control systems without the necessity of a dedicated rack-mounted monitor. By providing a proportional peak-to-peak vibration signal, the 990 transmitter ensures that critical machinery—such as centrifugal compressors and industrial pumps—is protected from catastrophic failure through real-time displacement tracking.

Hardware Parameters and Technical Specifications

The 990-04-50-03-00 configuration is optimized for signal integrity in harsh industrial environments, utilizing a 2-wire loop-powered architecture to simplify field wiring.

• Model Number 990-04-50-03-00

• Transducer Compatibility Designed for use with 3300 NSv Proximity Probes

• Full-Scale Range 0 to 100 µm (0 to 4 mils) peak-to-peak vibration

• System Length 5.0 Meters (Option -04)

• Mounting Configuration 35 mm DIN rail clips (Option -03)

• Agency Approvals Not Required/Standard (Option -00)

• Output Signal 4 to 20 mA DC (Proportional to vibration amplitude)

• Input Voltage 12 to 35 VDC (Loop-powered)

• Enclosure Material Polyphenylene sulfide (PPS) and Stainless Steel base

• Frequency Response 5 Hz to 5 kHz (± 3 dB)

• Interchangeability Supports system component replacement without manual calibration

Industrial Applications and Operational Use Cases

The 990-04-50-03-00 is a versatile solution for industrial monitoring where space and budget constraints preclude the use of larger, rack-based instrumentation.

• Centrifugal Air Compressors Real-time shaft vibration monitoring to detect unbalance, misalignment, or mechanical looseness in high-speed impellers.

• Small Process Pumps Providing an essential safety layer for auxiliary pumps in oil, gas, and chemical processing facilities.

• Industrial Motors and Fans Tracking rotor orbits and vibration levels to schedule predictive maintenance and avoid unplanned downtime.

• Balance-of-Plant (BoP) Equipment Implementation on cooling fans and secondary motors where basic 4-20 mA trending is sufficient for asset protection.

• DCS/PLC Integration Ideal for facilities utilizing high-density control system analog inputs for machinery health analytics.