Product Overview

The Bently Nevada 990-04-XX-01-01 (MOD:165335-01) is a high-precision, loop-powered vibration transmitter designed to provide continuous machinery protection for rotating assets. This integrated signal conditioner interfaces directly with a 3300 NSv proximity probe to monitor radial shaft vibration. By converting complex eddy current signals into a standardized 4 to 20 mA analog output, it allows for seamless integration into PLCs, DCS, or SCADA systems without the need for specialized rack-mounted monitors. The MOD:165335-01 designation indicates a specific modification tailored for OEM applications where compact footprints and extreme reliability are non-negotiable.

Key Technical Characteristics

The 990 series transmitter is engineered for durability and signal integrity in harsh industrial zones, featuring a robust housing and high-performance internal electronics.

• Model Number 990-04-XX-01-01 MOD:165335-01

• Input Signal Accepts input from 3300 NSv Proximity Probes

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

• System Length Configured for 5.0m or 7.0m system lengths (Option -04)

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

• Agency Approvals Standard Non-Hazardous Area (Option -01)

• Power Requirement 12 to 35 Vdc (Two-wire, loop-powered)

• Construction Material AISI 303/304 Stainless Steel casing

• Cable Interface 75Ω coaxial connector with FEP insulation

• Mechanical Strength 222N (50 lbf) maximum tensile strength at the probe lead

• Weight 0.44 kg (approx. 0.97 lbs)

Industrial Applications

Specifically developed for Original Equipment Manufacturers (OEMs), the 990-04-XX-01-01 provides essential data for machinery health monitoring and automated alarm logic in several critical sectors:

• Centrifugal Air Compressors Monitoring radial shaft vibration where space for traditional proximitor sensors is unavailable.

• Process Gas Pumps Providing a hardware-based safety layer to detect bearing wear or rotor unbalance.

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

• Balance-of-Plant (BoP) Equipment Offering cost-effective protection for small motors and auxiliary fans.

• TSI Modernization Serving as a reliable upgrade path for machinery control systems requiring modern 4-20mA instrumentation.