Description
Bently Nevada 330103-00-07-10-02-00 – 8 mm Proximity Probe for precise shaft vibration and position monitoring
The 330103 series is Bently Nevada’s 3300 XL 8 mm proximity probe, designed for non-contact measurement of shaft vibration, axial position, and rotor-to-stator clearance in turbomachinery. From my experience, this is the “go-to” probe when you want stable readings over long runs and thermal cycles, especially when it’s paired with the matching 3300 XL Proximitor Sensor and the correct extension cable. The -00-07-10-02-00 option string defines the mechanical and cable configuration for your installation, which typically means less time adapting in the field and more time capturing reliable data.
Company’s Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week if in stock; no more than 1 month at the latest
- Payment: 50% advance payment; full payment prior to delivery
- Express options: FedEx, UPS, DHL
Key Features
- 8 mm probe tip – optimized for heavy-duty turbomachinery and standard Bently Nevada targets (AISI 4140 steel).
- Non-contact eddy-current sensing – measures vibration and shaft position without mechanical wear.
- System scale factor – when used with the 3300 XL Proximitor Sensor, typical output is 200 mV/mil (≈7.87 mV/μm).
- Linear range – typically up to 2.0 mm (80 mil) for accurate displacement measurements.
- High-temperature tolerance – probe assemblies in this series are commonly rated to endure demanding machine environments.
- Robust construction – stainless-steel body and oil-resistant cable for reliable performance in lubricated bearings.
- Drop-in compatibility – designed to work with 330105 extension cables and the 3300 XL 8 mm Proximitor Sensor.
- Field-friendly installation – threaded body with locknut enables secure, repeatable mounting and gap setting.
Technical Specifications
| Brand / Model | Bently Nevada 330103-00-07-10-02-00 (3300 XL 8 mm Proximity Probe) |
| HS Code | 9031.80 (Measuring/monitoring instruments) |
| Power Requirements | Not applicable to the probe (passive). Powered via matching 3300 XL Proximitor Sensor. |
| Sensing Principle & Scaling | Eddy-current, non-contact; with the 3300 XL Proximitor Sensor the typical scale factor is 200 mV/mil (≈7.87 mV/μm). |
| Linear Range | Typically up to 2.0 mm (80 mil) with standard target material (AISI 4140). |
| Operating Temperature | Probe assemblies in this series are commonly rated from approximately -51 °C to +177 °C (probe tip). Exact rating depends on configuration. |
| Signal Input/Output | Coaxial connection to extension cable and Proximitor Sensor; system provides a DC voltage proportional to probe gap. |
| Communication Interfaces | None (analog displacement system via Proximitor). |
| Probe Tip & Mounting | 8 mm probe tip; threaded body with locknut for machine case mounting; gap set via feeler gauges. |
| Dimensions & Weight | 8 mm tip; integral cable length and thread style per option code; weight varies with length. |
| Installation Method | Threaded installation into probe brackets or machine case, locknut tightened; connect to 330105 extension cable and 3300 XL Proximitor Sensor. |
| Compatibility | Designed for Bently Nevada 3300 XL transducer systems (e.g., 330105 extension cable; 3300 XL 8 mm Proximitor Sensor). |
Application Fields
You might notice that the 330103 shows up wherever rotating assets are critical. Typical use cases include:
- Steam and gas turbines – radial vibration and thrust position monitoring.
- Compressors and blowers – bearing condition and rotor clearance checks.
- Pumps and fans – vibration protection and trend analysis in hazardous or hot zones.
- Generators and motors – shaft runout and alignment verification.
- Gearboxes – early fault detection through displacement variance.
Advantages & Value
- Reliability under heat and oil – built to withstand typical bearing housings and lube environments without drift.
- System compatibility – pairs with standard Bently Nevada 3300 XL components, simplifying spares and maintenance.
- Procurement efficiency – widely stocked in many cases, which shortens outages and reduces expedited costs.
- Measurement confidence – consistent scaling across probes and proximitor sensors makes mixed-fleet support easier.
A maintenance lead at a power plant mentioned that swapping to the 330103 on two turbine bearings “cleaned up the signal” and stabilized the zero-gap point after a hot restart. That seems to be a common theme with this series.
Installation & Maintenance
- Panel/cabinet environment – route the proximitor and cabling in a ventilated control cabinet; avoid tight bends on coax.
- Wiring – use the specified 330105 extension cable; keep separation from high-voltage runs to minimize noise.
- Probe placement – mount perpendicular to the shaft surface, target material AISI 4140; set nominal gap per OEM spec.
- Locking – snug the locknut to the recommended torque to hold the calibrated gap setting.
- Safety – de-energize the monitoring system during installation; confirm shaft is locked out before gap adjustments.
- Routine care – inspect cable jacket quarterly, clean probe tip if oil varnish builds up, and verify readings after major overhauls.
- Firmware/monitor checks – where applicable, keep the monitoring rack/relay firmware current and re-verify scale factor.
Quality & Certifications
- CE marking and RoHS compliance are typically available for this series.
- Manufactured under ISO 9001 quality systems (manufacturer level).
- 365-day warranty support.
Related/Supporting Components
- 330105 – Extension Cable for 3300 XL 8 mm/5 mm probes.
- 3300 XL 8 mm Proximitor Sensor – completes the transducer system and provides the conditioned analog output.
Reviews
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