Bently Nevada 330903 Modules - 330903-17-19-05-02-00

Technical Dossier

Product Details And Specifications

Bently Nevada 330903 Series Technical Notes

The Bently Nevada 330903 series represents the NSv (Non-Standard voltage) proximity probe product line manufactured by Baker Hughes (formerly GE Bently Nevada). This series is deployed extensively across global heavy industry installations including petrochemical refineries, nuclear power stations, offshore platforms, and rotating machinery monitoring systems in steel mills and LNG terminals. The 330903 probe is a passive eddy-current sensing element designed to interface with Bently Nevada 3300 XL and TK3 series signal conditioning systems, providing continuous non-contact displacement measurement of shaft radial vibration, axial position, and differential expansion. Its field-proven reliability in high-temperature, high-vibration environments has made it a standard specification component in API 670-compliant machinery protection systems worldwide.

The Evolution of 330903 Architecture

The 330903 series was introduced as part of Bently Nevada's second-generation NSv proximity probe platform, succeeding the earlier 330100 and 330500 series which operated on standard 200 mV/mil sensitivity. The 330903 standardized on a 100 mV/mil output sensitivity with a nominal gap voltage of -10.0 VDC at 50 mil (1.27 mm) gap, optimized for use with the 3300 XL proximitor/seismic transducer system. Early variants used a fixed-length integral cable construction; later revisions introduced armored extension cable options and high-temperature probe tip materials rated to 175°C continuous. The transition from the 3300 XL to the TK3 platform (introduced circa 2010) maintained backward compatibility with 330903 probes, preserving installed base investments across facilities with 20–30 year equipment lifecycles. As of 2024, the 330903 series is classified as a mature/sustaining product. Baker Hughes continues to supply replacement units and supports the installed base, but new greenfield projects are increasingly specified with the 330980 and 330905 series. For facilities maintaining legacy 3300 XL systems, long-term maintenance sourcing of 330903 variants remains a critical operational requirement.

330903 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed configurations within the 330903 NSv Proximity Probe series. Each model designation encodes probe length, cable length, connector type, temperature rating, and tip diameter per Bently Nevada's standard part numbering convention.

330903-17-19-05-02-00: 5mm tip, 19-inch probe, 2-meter cable, standard temp, NSv output
330903-17-19-05-05-00: 5mm tip, 19-inch probe, 5-meter extension cable, standard configuration
330903-17-19-05-08-00: 5mm tip, 19-inch probe, 8-meter cable, standard temp rating
330903-17-19-05-02-CN: 5mm tip, 19-inch probe, 2-meter cable, China-market connector variant
330903-17-19-08-02-00: 8mm tip diameter, 19-inch probe, 2-meter cable, standard NSv
330903-17-19-08-05-00: 8mm tip, 19-inch probe, 5-meter cable, standard temperature
330903-17-19-08-08-00: 8mm tip, 19-inch probe, 8-meter cable, standard configuration
330903-17-19-08-02-CN: 8mm tip, 19-inch probe, 2-meter cable, China connector variant
330903-17-25-05-02-00: 5mm tip, 25-inch probe, 2-meter cable, extended reach NSv
330903-17-25-08-02-00: 8mm tip, 25-inch probe, 2-meter cable, extended reach configuration
330903-17-25-08-05-00: 8mm tip, 25-inch probe, 5-meter cable, extended reach
330903-17-19-05-02-HT: 5mm tip, 19-inch probe, 2-meter cable, high-temperature rated (175°C)
330903-17-19-08-02-HT: 8mm tip, 19-inch probe, 2-meter cable, high-temperature variant
330903-17-25-05-02-HT: 5mm tip, 25-inch probe, 2-meter cable, high-temperature rated
330903-17-25-08-02-HT: 8mm tip, 25-inch probe, 2-meter cable, high-temp extended reach
330903-17-19-05-05-HT: 5mm tip, 19-inch probe, 5-meter cable, high-temperature, extended cable