Bently Nevada 330400 Proximity Transducer System Modules – 330400-01-00

Technical Dossier

Product Details And Specifications

Bently Nevada 330400 Series Technical Notes

The Bently Nevada 330400 Proximity Transducer System is a standardized eddy-current sensing platform deployed across global heavy industry — including petrochemical refineries, nuclear power stations, LNG terminals, and rotating machinery installations in offshore platforms. The 330400 series functions as the primary non-contact displacement measurement interface within Bently Nevada's 3300 and 3500 machinery protection architectures. Its role is to convert shaft radial vibration, axial position, and differential expansion into 4–20 mA or voltage signals compatible with rack-mounted monitors. The series is installed on critical rotating assets including steam turbines, gas compressors, centrifugal pumps, and gearboxes where continuous shaft proximity monitoring is a regulatory and operational requirement. The 330400 line is fully interchangeable within the Bently Nevada 3300 XL and 3500 series monitor racks, making it a long-lifecycle platform with an installed base spanning several decades across API 670-compliant machinery protection systems.

330400 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked configurations within the Bently Nevada 330400 Proximity Transducer System. Each entry reflects a distinct mechanical or electrical specification variant.

330400-01-00: 5 mm probe, 1m integral cable, standard temperature, AISI 4140 target, 3300 XL compatible.
330400-02-00: 5 mm probe, 2m integral cable, standard temperature, radial vibration measurement.
330400-03-00: 5 mm probe, 3m integral cable, standard temperature, general-purpose shaft proximity.
330400-05-00: 5 mm probe, 5m integral cable, extended reach installation, turbine bearing housings.
330400-07-00: 5 mm probe, 7m integral cable, long-run cable configuration, compressor trains.
330400-09-00: 5 mm probe, 9m integral cable, maximum standard cable length, large machinery footprints.
330400-11-00: High-temperature probe variant, rated to 177°C, steam turbine hot-zone installations.
330400-13-00: Armored cable version, 3m, mechanical protection for exposed cable runs.
330400-15-00: Armored cable version, 5m, petrochemical plant routing with conduit constraints.
330400-17-00: Armored cable version, 7m, offshore platform installations with vibration-exposed cable paths.
330400-19-00: Armored cable version, 9m, refinery compressor trains with extended cable routing.
330400-21-00: Stainless steel housing variant, corrosion-resistant, wet or chemically aggressive environments.
330400-23-00: Differential expansion configuration, axial position measurement on steam turbines.
330400-25-00: Thrust position variant, paired with 3500/45 thrust monitor module.
330400-27-00: Phase reference (Keyphasor) configuration, once-per-revolution trigger signal for vibration analysis.
330400-29-00: Extended gap range variant, 0.25–2.25 mm linear range, large-clearance bearing housings.
330400-31-00: Metric thread M8 probe body, European machinery standards compliance.
330400-33-00: UNF 3/8-24 thread probe body, North American API 670 standard installations.