Product Overview

The Bently Nevada 990-10-XX-01-05 (MOD:165353-07) is a sophisticated 2-wire, loop-powered vibration transmitter designed to provide continuous radial vibration data for industrial rotating machinery. This specialized module functions as an integrated Proximitor sensor, eliminating the need for a separate signal conditioner by interfacing directly with 3300 NSv proximity probes. It converts high-frequency eddy current signals into a standardized 4–20 mA analog output, allowing for direct integration into PLCs, DCS, or SCADA systems. The "MOD" designation refers to a specific modification (165353-07), ensuring compatibility with 10-mil measurement ranges while maintaining the high RFI/EMI immunity standards required for Turbine Supervisory Instrumentation (TSI).

Key Technical Characteristics and Hardware Parameters

The 990-10-XX-01-05 transmitter is optimized for precision and ease of deployment in high-density control cabinets.

• Model Number 165353-07

• Full-Scale Measurement Range 0–10 mils peak-to-peak (approx. 0–250 µm)

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

• Frequency Response 5 Hz to 6,000 Hz (±3 dB)

• Input Voltage Range 12–24 VDC (Typical loop power)

• Transducer Compatibility 3300 NSv Proximity Probe

• System Length Supports 5.0m or 7.0m total system lengths

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

• Agency Approvals CSA/ATEX/IECEx Hazardous Area certifications (Option -05)

• Diagnostic Outputs Non-isolated terminals for buffered dynamic signal (vibration) and Gap Voltage

• Minimum Target Diameter 9.5 mm (0.375 in)

Industrial Applications and Operational Use Cases

The 990 series transmitter is the industry standard for OEM applications where space is limited and standalone machinery protection is required. Its primary use cases include:

• Centrifugal Air Compressors Monitoring radial shaft vibration in tight clearances where traditional 8mm probes cannot fit.

• Small Pumps and Motors Providing cost-effective, continuous vibration trending for balance-of-plant (BoP) equipment.

• Cooling Tower Fans Transmitting vibration data over long distances via a current loop to a central control room.

• Predictive Maintenance Utilizing the buffered output terminals for periodic diagnostic analysis using portable vibration analyzers without interrupting the 4–20 mA protection loop.

• Hazardous Process Zones Deploying reliable vibration monitoring in explosive atmospheres typical of oil, gas, and chemical processing facilities.