Bently Nevada 330101 Proximity Probe Modules - 330101-00-20-20-02-CN

Technical Dossier

Product Details And Specifications

Bently Nevada 330101 Series Technical Notes

The series covers cable lengths from 5 mm to 14 mm tip-to-target gap ranges, with standard metric and imperial cable configurations. Operating temperature range: -35°C to +121°C. Probe body material: stainless steel (316L). Connector: integral armored cable with MIL-spec connector. Sensitivity: 7.87 V/mm (200 mV/mil). Frequency response: DC to 10,000 Hz.

The Evolution of 330101 Architecture

The 330101 probe line was introduced as part of Bently Nevada's 3300 XL platform in the early 1990s, replacing the earlier 7200 and 3300 5mm probe families. The 3300 XL 8mm standard addressed limitations of earlier designs: improved EMI rejection, tighter sensitivity tolerance (±0.127 V/mm vs. ±0.254 V/mm on legacy 7200 probes), and a standardized armored cable jacket rated for hydrocarbon and H₂S environments.

Key architectural milestones: (1) Pre-XL era (pre-1992) — 7200 Series 5mm probes, non-interchangeable with 3300 XL drivers. (2) 3300 XL introduction (1992–2005) — 330101 8mm probes standardized; 330180 proximitor introduced. (3) System 1 integration (2005–2015) — 330101 probes became primary sensors feeding System 1 condition monitoring software via 3500 rack I/O. (4) Post-2015 / Baker Hughes era — 330101 series entered mature/sustaining lifecycle; no new hardware revisions. Replacement path is the Bently Nevada 330780 (REBAM) or 3500/42M velocity/acceleration modules for new installations. For existing 3300 XL installations, 330101 probes remain the only API 670-compliant drop-in replacement.

Compatibility note: 330101 probes are not interchangeable with 330900 (5mm) or 330500 (25mm) series probes. Extension cable length must be matched to the specific probe/proximitor combination to maintain system calibration.

330101 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified active and recently obsoleted models within the Bently Nevada 330101 proximity probe family, organized by cable configuration and tip geometry:

330101-00-05-10-02-CN: 5 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-05-10-02-05: 5 ft armored cable, 10 mm tip, flying-lead termination, metric.
330101-00-08-10-02-CN: 8 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-10-10-02-CN: 10 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-12-10-02-CN: 12 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-15-10-02-CN: 15 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-20-10-02-CN: 20 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-20-20-02-CN: 20 ft armored cable, 20 mm tip, standard connector, metric calibration — current listing SKU.
330101-00-25-10-02-CN: 25 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-30-10-02-CN: 30 ft armored cable, 10 mm tip, standard connector, metric calibration.
330101-00-05-10-02-00: 5 ft armored cable, 10 mm tip, bare-end termination, metric.
330101-00-08-10-02-00: 8 ft armored cable, 10 mm tip, bare-end termination, metric.
330101-00-10-10-02-00: 10 ft armored cable, 10 mm tip, bare-end termination, metric.
330101-00-20-10-02-00: 20 ft armored cable, 10 mm tip, bare-end termination, metric.
330101-00-30-10-02-00: 30 ft armored cable, 10 mm tip, bare-end termination, metric.
330101-00-05-10-02-05: 5 ft armored cable, 10 mm tip, flying-lead, metric — common OEM variant.
330101-00-10-20-02-CN: 10 ft armored cable, 20 mm tip, standard connector, metric calibration.
330101-00-15-20-02-CN: 15 ft armored cable, 20 mm tip, standard connector, metric calibration.

Quality Control for the 330101 Range

Proximity probes present specific QC challenges distinct from digital I/O or CPU modules: the eddy-current sensing coil, armored cable impedance, and connector integrity must all be verified as a matched system. DriveKNMS applies the following test protocol to all 330101 units prior to dispatch:

Step 1 — Visual and mechanical inspection: Probe tip face examined under 10× magnification for corrosion pitting, mechanical damage, or epoxy delamination. Cable armor inspected for kinks, crush damage, and jacket integrity. Connector pins checked for fretting corrosion and proper seating depth.

Step 2 — Coil impedance measurement: Probe coil resistance measured at 25°C reference temperature. Acceptable range per Bently Nevada specification: 7.0–9.0 Ω. Out-of-tolerance units are quarantined.

Step 3 — System sensitivity verification: Each probe is bench-tested with a matched 330130 extension cable and 330180 proximitor against a calibrated steel target (AISI 4140). Gap swept from 0.25 mm to 2.54 mm. Output linearity verified against 7.87 V/mm ± 5% specification across full gap range.

Step 4 — High-potential (Hi-Pot) test: Cable insulation tested at 500 VDC for 60 seconds. Leakage current must not exceed 1 mA.