Bently Nevada 990 Series Modules - 990-08-XX-01-CN MOD:163930-02

Name: Bently Nevada 990 Series Modules - 990-08-XX-01-CN MOD:163930-02
Brand: Bently Nevada

Model: 990-08-XX-01-CN MOD:163930-02

Brand Bently Nevada

Series 990 Series

Model 990-08-XX-01-CN MOD:163930-02

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Product Details And Specifications

Bently Nevada 990 Series Technical Notes

The Bently Nevada 990 Series vibration transmitter is a field-mounted, loop-powered device engineered for continuous machinery protection in the most demanding heavy industrial environments. Deployed extensively across petrochemical refineries, nuclear power stations, offshore platforms, LNG terminals, and rotating equipment monitoring systems worldwide, the 990 Series converts raw proximity probe signals into standardized 4–20 mA outputs compatible with any DCS, PLC, or safety instrumented system (SIS). Its ruggedized housing, wide operating temperature range, and compatibility with the Bently Nevada 3300 and 7200 series proximity probe systems have made it a de facto standard for turbine, compressor, and pump shaft vibration monitoring over three decades of continuous industrial deployment.

The Evolution of 990 Series Architecture

The 990 Series was introduced as a field-transmitter complement to Bently Nevada's rack-mounted 3300 Series monitoring systems, addressing the need for distributed, panel-independent vibration signal conditioning. Early variants (990-05, 990-08) were designed around analog signal processing with fixed gap voltage ranges and single-channel output. The architecture evolved through successive generations to support dual-channel configurations, configurable gap voltage windows, and enhanced EMI shielding for environments with high electrical noise floors common in motor control centers and switchgear rooms.

The 990-08-XX-01-CN (MOD: 163930-02) represents a CN-suffix variant indicating a specific connector or cable termination configuration, optimized for direct field wiring without intermediate junction boxes. As the broader Bently Nevada product portfolio migrated toward the System 1 software ecosystem and the 3701/3711 series rack monitors, the 990 Series transitioned into a mature/sustaining lifecycle phase. Baker Hughes (the current owner of the Bently Nevada brand) continues to support the 990 Series for installed base maintenance, but new greenfield installations increasingly specify the 3701 or Orbit 60 Series. This lifecycle position makes long-term spare parts availability a critical operational concern for asset owners.

990 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked configurations within the Bently Nevada 990 Series. Each unit is a single-channel or dual-channel vibration transmitter unless otherwise noted.

990-05-XX-01-CN: Single-channel, 5 m cable, standard gap voltage, CN connector termination.
990-05-XX-02-CN: Single-channel, 5 m cable, extended gap voltage range, CN termination.
990-08-XX-01-CN MOD:163930-02: Single-channel, 8 m cable, standard configuration, MOD 163930-02 revision, CN termination.
990-08-XX-01-CN MOD:163930-01: Single-channel, 8 m cable, prior MOD revision, functionally equivalent to -02.
990-08-XX-02-CN: Single-channel, 8 m cable, high-temperature housing variant.
990-08-XX-05-CN: Single-channel, 8 m cable, intrinsically safe (IS) rated for Zone 1 hazardous areas.
990-05-01-01-00: Single-channel, 5 m cable, standard output, DIN rail mount option.
990-05-02-01-00: Single-channel, 5 m cable, dual output (vibration + gap), DIN rail mount.
990-08-01-01-00: Single-channel, 8 m cable, standard 4–20 mA output, panel mount.
990-08-02-01-00: Single-channel, 8 m cable, dual output (vibration + gap), panel mount.
990-08-05-01-00: Single-channel, 8 m cable, ATEX/IECEx certified, intrinsically safe.
990-08-XX-01-00: Single-channel, 8 m cable, universal gap voltage, standard output.
990-05-XX-05-CN: Single-channel, 5 m cable, IS-rated, CN termination, Zone 0/1 approved.
990-08-XX-03-CN: Single-channel, 8 m cable, stainless steel housing, corrosion-resistant variant.
990-08-XX-04-CN: Single-channel, 8 m cable, extended temperature range (–50°C to +85°C).
990-05-XX-03-CN: Single-channel, 5 m cable, stainless steel housing, offshore/marine grade.
990-08-XX-01-CN MOD:163930-03: Latest MOD revision of the 8 m CN variant; incorporates updated PCB layout for improved EMI rejection.

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