Product Overview

The Bently Nevada 990-06-70-01-05 is a high-performance, standalone vibration transmitter designed to provide a continuous 4-20 mA output proportional to radial vibration. Engineered for seamless integration with PLC or DCS control systems, this module combines the functionality of a Proximitor sensor and a signal conditioner into a single, rail-mountable unit. By accepting inputs from a 3300 NSv proximity probe, it enables cost-effective machinery protection for centrifugal compressors, pumps, and motors without the need for a dedicated rack-based monitoring system.

Hardware Parameters

• Model Number 990-06-70-01-05

• Input Compatibility 3300 NSv Proximity Probe and Extension Cable

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

• Diagnostic Ports Coaxial connector and "PROX OUT" terminals for dynamic signal analysis

• Calibration Controls Non-interacting Zero and Span potentiometers

• Fault Logic Integrated Not OK/Signal Defeat circuit to prevent false trips

• Power Supply +12 to +35 Vdc

• Environmental Ratings IP20; Type 4X when installed in an appropriate enclosure

• Approvals CSA, ATEX, and IECEx certified for hazardous area operation

• Physical Profile 0.44 kg; Supports DIN-rail or bulkhead mounting

Industrial Applications

The 990-06-70-01-05 is primarily utilized by industrial OEMs and plant engineers for monitoring the radial vibration of fluid-film bearing machines. Its compact design is ideal for space-constrained skid-mounted equipment such as fans, blowers, and small turbines. The transmitter provides a dual-purpose interface: while the 4-20 mA loop handles primary alarming and trending for the control system, the buffered coaxial output allows maintenance personnel to connect a portable vibration analyzer or oscilloscope for deep-dive diagnostics and frequency spectrum analysis. This ensures that maintenance teams can distinguish between unbalance, misalignment, or bearing degradation during live operation.