Bently Nevada 330980 NSV Proximitor Sensor Modules – 330980-70-05

Technical Dossier

Product Details And Specifications

Bently Nevada 330980 Series Technical Notes

The Bently Nevada 330980 series comprises Non-contacting Voltage (NSV) Proximitor Sensors engineered for continuous vibration and position monitoring in rotating machinery. These sensors are deployed across the global heavy-process industries — petrochemical complexes, nuclear power stations, offshore platforms, and crude oil refineries — where shaft displacement measurement is a safety-critical function. The 330980 series interfaces directly with Bently Nevada 3300, 3500, and ADRE-series monitoring systems, providing 4–20 mA or voltage output signals proportional to the gap between the probe tip and the observed target surface. Its eddy-current operating principle delivers non-contact, wear-free measurement with sub-micron resolution, making it the standard reference for API 670-compliant machinery protection installations worldwide.

330980 Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented production variants of the Bently Nevada 330980 NSV Proximitor Sensor series, classified by output configuration, cable length, and target compatibility:

330980-70-05: NSV Proximitor, 5 m integral cable, standard gap range, 3300/3500 compatible
330980-70-00: NSV Proximitor, no integral cable, bare-end termination, field-wired installation
330980-70-01: NSV Proximitor, 1 m integral cable, short-reach proximity measurement
330980-70-02: NSV Proximitor, 2 m integral cable, mid-range cable configuration
330980-70-03: NSV Proximitor, 3 m integral cable, standard turbine pedestal depth
330980-70-04: NSV Proximitor, 4 m integral cable, extended pedestal or bearing housing reach
330980-70-08: NSV Proximitor, 8 m integral cable, long-run installation without extension cable
330980-70-09: NSV Proximitor, 9 m integral cable, remote-mounted monitor panel applications
330980-70-10: NSV Proximitor, 10 m integral cable, maximum standard integral cable length
330980-71-05: NSV Proximitor, 5 m cable, high-temperature housing variant, up to 121°C ambient
330980-71-00: NSV Proximitor, no cable, high-temperature housing, field-wired
330980-72-05: NSV Proximitor, 5 m cable, stainless steel housing, corrosive-atmosphere rated
330980-50-05: NSV Proximitor, 5 m cable, 50-series target calibration, non-standard alloy shafts
330980-51-05: NSV Proximitor, 5 m cable, 51-series target calibration, Inconel shaft applications
330980-90-05: NSV Proximitor, 5 m cable, ATEX/IECEx Zone 1 certified, hazardous area installation

Quality Control for the 330980 Range

The 330980 Proximitor Sensor integrates an oscillator circuit, demodulator, and output driver within a sealed housing. Standard visual inspection is insufficient to verify functional integrity. DriveKNMS applies a structured test protocol specific to this series: each unit undergoes gap-voltage calibration verification using a calibrated target disc and precision micrometer stage, confirming the output voltage curve matches the Bently Nevada factory specification (typically -18 VDC supply, linear output across the 0.25–2.25 mm gap range). Oscillator frequency is verified against the nominal 1.0 MHz center frequency using a calibrated frequency counter. Cable continuity and insulation resistance are tested at 500 VDC to detect degraded integral cable insulation — a common failure mode in units recovered from high-vibration environments. Output noise floor is measured to confirm it remains within the 50 mV peak-to-peak specification required for reliable 3500-series monitor card input. Units that pass all test points are issued a DriveKNMS functional test certificate with recorded test data. Units that fail any parameter are quarantined and not offered for sale.