BENTLY 330400-02-RU – Proximity Transducer System Component for Precise Vibration and Shaft Position Monitoring

The BENTLY 330400-02-RU belongs to the 3300 series proximity transducer system used on critical rotating assets. In many cases, this part is specified alongside 3300 XL probes and extension cables to provide accurate shaft displacement (gap) and dynamic vibration measurements to 3300/3500 rack monitors. You might notice that the “-RU” suffix simply indicates a Russian-language packaging/documentation option; functionally it matches the standard 330400-02 variant. From my experience, it’s chosen by maintenance teams who want dependable eddy-current measurement hardware that integrates cleanly with existing Bently Nevada infrastructure.

Order Placement Process & Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL
• Pre-shipment support: photos/condition check and packing details typically provided upon request

Key Features

• 3300/3500 monitor compatibility – Designed to work within Bently Nevada proximity transducer systems commonly tied to 3300 and 3500 racks.
• Non-contact eddy-current measurement – Measures shaft position (gap) and dynamic vibration without mechanical contact, reducing wear and drift.
• Stable sensitivity – In many cases, systems are calibrated to 200 mV/mil (≈7.87 mV/μm) for 5 mm/8 mm probe configurations, giving maintenance teams predictable diagnostics.
• Robust industrial design – Built for harsh plant environments with oil, temperature variation, and electrical noise in mind.
• “-RU” option – Typically denotes Russian-language labeling/manuals; electronics and performance are the same as non-RU units.
• Straightforward integration – No special software or protocols; analog signals wire directly to condition monitoring inputs.

Technical Specifications

Application Fields

Typical use is continuous condition monitoring and protection on:

• Steam and gas turbines (bearing vibration and axial position)
• Compressors and expanders (casing/bearing vibration, shaft displacement)
• Pumps and fans (unbalance, misalignment indication via dynamic displacement)
• Gearboxes and generators (trend monitoring and trip thresholds)

A maintenance lead from a refinery told us the 3300-type proximity chain “seems to be the least troublesome part of the loop—once gapped right, it just runs,” which mirrors what we typically see in long-cycle plants.

Advantages & Value

• Reliability – Proven hardware for critical machinery where false trips and drift are costly.
• Compatibility – Works within existing Bently Nevada architectures, reducing retrofit effort.
• Lifecycle savings – Stable calibration and rugged design typically mean fewer field reworks.
• Support – We help verify option codes (-02, -RU) against your installed base before shipment to avoid mismatches.

Installation & Maintenance

• Cabinet & environment – Mount electronics in a dry, vibration-safe enclosure; provide ventilation and keep away from high-voltage busbars to minimize EMI.
• Wiring – Use specified shielded/coax extension leads; maintain correct shielding and grounding (typically grounded at the monitor end only).
• Gapping – Set the probe gap within the recommended range and verify bias voltage at the monitor; this is the quickest way to spot installation issues.
• Routine checks – Periodically inspect connectors for oil ingress, verify loop integrity, and review trend data. Firmware updates apply at the monitor level (3500 rack), not the passive transducer chain.
• Safety – Lockout/tagout rotating equipment; route cables clear of rotating parts and hot surfaces; keep minimum bend radius per the cable spec.

Quality & Certifications

• Typically conforms to CE and RoHS requirements for industrial instrumentation
• Manufactured under ISO 9001 quality systems by the OEM
• Warranty: 365 days replacement/repair policy

Recommended Supporting Components

• BENTLY NEVADA 330103 / 330104 proximity probes (5 mm / 8 mm)
• BENTLY NEVADA 330130 extension cables (length options matched to probe)
• BENTLY NEVADA 3500 series monitors for rack-based protection and trending

If you share your installed probe model and cable length, we can double-check that 330400-02-RU matches your current transducer chain before you place the order. That cross-check typically prevents nuisance calibration work at site.