Bently Nevada 330704-000-040-10-02-00 – 3300 XL 8 mm Proximity Probe for precision shaft vibration and position

The Bently Nevada 330704-000-040-10-02-00 is part of the 3300 XL proximity transducer family used on critical rotating assets. It’s the probe element of the classic three‑piece system (probe + extension cable + Proximitor sensor), delivering stable, non-contact displacement measurements for turbines, compressors, pumps, and large motors. One thing I appreciate is how consistent these 8 mm probes are when matched with the proper 3300 XL Proximitor—sensitivity typically lands right where you expect it, which makes repeatable gap setting much easier in the field.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week when in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 3300 XL 8 mm sensing – Designed for non-contact eddy-current displacement measurement on conductive targets (shaft vibration and axial position).
• Matched system performance – When paired with a 3300 XL Proximitor, sensitivity is typically 7.87 mV/µm (200 mV/mil) with a linear range around 2.0 mm (80 mils).
• Factory-integrated cable – Option code “040” indicates a 4.0 m integral lead, simplifying routing to the extension cable junction.
• Robust mounting – Thread option “10” is commonly the 3/8‑24 UNF thread, giving a secure, repeatable mount in standard probe sleeves.
• Industrial endurance – Built for harsh environments; stable readings in most plant conditions when installed and gapped correctly.
• System compatibility – Works with Bently Nevada 3300 XL Proximitor sensors and feeds into 3500/1900 series monitors in many cases.

Technical Specifications

Application Fields

From my experience, this probe is a safe choice for high-value rotating machines where trending small changes matters. Typical deployments include:

• Steam and gas turbines (radial vibration, shaft relative displacement)
• Compressors and gearboxes (radial vibration, axial position when configured with thrust measurements)
• Large pumps and fans (bearing health and alignment monitoring)
• Generators and high-speed motors (startup/overspeed diagnostics, rub detection)

A maintenance lead at a gas plant told me they swapped to this exact option set to standardize the 4 m leads—made spares management simpler and reduced gap-setting drift across identical pump trains.

Advantages & Value

• Reliability – Stable readings over time, which typically means fewer unplanned re-gaps and less troubleshooting.
• Compatibility – Drop-in fit with the 3300 XL Proximitor and common Bently Nevada monitoring racks (e.g., 3500 series).
• Lifecycle savings – Consistent sensitivity reduces calibration time and helps avoid nuisance alarms that cost downtime.
• Technical support – We can assist with option code verification, probe-to-sleeve fit, and gap-setting best practices.

Installation & Maintenance

• Cabinet & routing: Use a clean instrumentation cabinet for the Proximitor; route the probe and extension cables in metallic conduit away from high-voltage lines; respect the minimum bend radius of the coax.
• Mounting: Install in a compatible probe sleeve (commonly for 3/8‑24 UNF); torque the locknut evenly to avoid probe tip skew. Ensure the target surface is clean and free of magnetic debris.
• Gap setting: Using a standard feeler gauge or micrometer tool, set the initial gap within the recommended range for your system bias voltage; verify bias at the monitor after warm-up.
• Safety: Isolate rotating equipment; follow plant LOTO procedures; avoid contact with the probe tip and do not over-tighten the coax connectors.
• Routine care: Periodically inspect connectors, clean the probe tip if contamination is suspected, check bias voltage drift, and keep firmware of the connected monitoring system current.

Quality & Certifications

• Manufacturer quality systems typically aligned with ISO 9001
• Compliance commonly includes CE and RoHS for the transducer system
• Warranty provided: 365 days

Supporting Components (for a complete system)

• 3300 XL Proximitor Sensor – Required to energize the probe and provide the conditioned voltage output to the monitor.
• 3300 XL Extension Cable – Connects the probe’s 4.0 m lead to the Proximitor; available in common lengths (for example, 5 m, 7 m, 9 m).
• Probe Sleeves and Locknuts – Proper sleeves ensure correct depth and stable mounting in bearing housings.
• Monitoring Racks – Compatible in many cases with Bently Nevada 3500/1900 series for channel configuration and alarming.

If you need help double-checking that option code “10-02” matches your thread and connector preference, send a photo of your installed spares or the BOM from an adjacent machine train. Matching option sets across trains typically reduces setup time and keeps vibration baselines consistent.