Bently Nevada P3403893-0351 Vibration Transmitter

Product Description

The Bently Nevada P3403893-0351 is a reliable, industrial-grade 2-wire loop-powered vibration transmitter from the foundational 990 Series line. Engineered primarily for Original Equipment Manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, and fans, this transmitter conditions raw proximity probe signals directly into industry-standard 4-20 mA linear output loops. 

Technical Specifications

• Manufacturer: Bently Nevada (A Baker Hughes Business)

• Country of Origin: United States of America (USA)

• Product Series Lifecycle: 990 Series Vibration Transmitter Family

• Part Number Designation: P3403893-0351

• Wiring Topology: 2-Wire loop-powered infrastructure

• Linear Analog Output: 4 to 20 mA DC (proportional to total vibration amplitude engineering units)

• Loop Operating Voltage Range: 12 to 35 VDC (Accepts standard 24 VDC industrial power rails)

• Transducer Compatibility: Directly integrates with standard Bently Nevada proximity probe systems (such as the 3300 NSv eddy current probe and matching extension cable)

• Maximum Loop Load Resistance: Up to 600 Ohms

• Diagnostic Signal Terminals:

• Non-isolated "PROX OUT" and "COM" pins

• Coaxial BNC connector interface for raw, dynamic vibration wavefront and gap voltage analysis

• Adjustment Mechanisms: Non-interacting zero and span potentiometers for precise field loop tuning

• Internal Safety Circuitry: Built-in Not OK / Signal Defeat safety logic to prevent false machinery trips caused by loose connections or faulty probe lines

• Enclosure Protection Rating: Potted construction rated for up to 100% condensing humidity environments

• Physical Mounting Configurations: Supports standard integrated DIN-rail clip snaps or rugged bulkhead screw installations

• Approximate Instrument Weight: 1.15 lbs (Approx. 0.52 kg)

• Approximate Enclosure Footprint Dimensions: 7.5 cm × 6.0 cm × 10.0 cm

Industrial Application Scenarios

The BENTLY NEVADA P3403893-0351 990 transmitter is typically hardwired directly onto small-to-medium rotating equipment blocks where a full-scale monitoring rack (like the Bently Nevada 3500 system) is cost-prohibitive. It is commonly found tracking shaft vibration on plant utility equipment, including boiler feed pumps, forced draft fans, cooling tower gearboxes, and standalone plant air compressors. Because it delivers a direct 4-20 mA loop, the transmitter feeds machinery health trends directly into standard PLC or DCS analog input cards. During scheduled field diagnostics, maintenance engineers use the integrated coaxial connector on the front panel to attach portable data collectors and oscilloscopes, capturing high-resolution dynamic waveforms without interrupting the primary protection loop.