Bently Nevada 330171-00-26-10-02-00 | 3300 XL 11mm Eddy Current Probe

The 330171-00-26-10-02-00 is an 11mm eddy current probe from Bently Nevada's 3300 XL series. Unlike standard 8mm probes, this model features a wider linear measuring range, specifically engineered for large shaft float, heavy axial thrust and high-vibration industrial rotating equipment. It delivers true non-contact shaft dynamic measurement, operates reliably in high-temperature, high-interference field environments, and serves as the front-end sensing core for turbine and compressor machinery protection systems.
The 330171 11mm proximity probe is designed for applications requiring larger displacement monitoring margins. Equipped with 1/4-28 UNF mounting thread and a 2-meter integrated triaxial cable, it features an industrial stainless steel body and high-temperature resistant sensing tip, fully adapted for long-term bearing housing installation.
Based on eddy current induction principle, the probe captures real-time gap changes between probe tip and rotor surface. Its core advantage lies in a wider linear range of 0.5mm - 3.8mm and a matched sensitivity of 3.94 V/mm. This solves measurement failure problems of standard probes caused by excessive shaft axial displacement and large radial runout on heavy-duty units.
With built-in anti-RFI and anti-EMI interference capability, it effectively filters on-site frequency conversion and electromagnetic signal noise. It must be used in conjunction with supporting proximitor and extension cable, fully compatible with Bently 3300/3500 monitoring racks. Factory pre-calibration ensures consistent field measurement accuracy and excellent long-term operational stability.

This 11mm wide-range probe addresses the core challenge of insufficient measurement stroke for large-scale rotating equipment. It reliably tracks shaft radial vibration, axial thrust position and rotor dynamic runout data in real time.
It can detect early-stage faults including oil film oscillation, thrust pad wear, rotor misalignment and bearing fatigue deterioration. Accurate shaft direct measurement avoids the lag and inaccuracy of casing vibration monitoring. This enables precise predictive maintenance, effectively reduces unplanned shutdown risks, and protects high-value rotating equipment from catastrophic mechanical damage.

• Reserve reasonable static gap during installation, using the linear midpoint as reference to avoid signal saturation or clipping caused by large shaft dynamic swing
• Strictly control cable bending and stretching damage; the integrated triaxial cable cannot be arbitrarily cut or lengthened
• Ensure complete coverage of the probe sensing area by the rotor target surface to prevent edge effect from affecting data linearity

• Rotating machinery online protection systems
• Vibration & shaft-position monitoring
• Steam turbine and compressor safety supervision
• Large fan, generator and high-speed pump condition monitoring
• Oil & gas facilities
• Chemical processing plants
• Power generation facilities
• Metal processing & coal-chemical plants

A large refinery replaced old 8mm probes with Bently 330171 11mm probes for its large-flow compressor. The wider linear range perfectly adapted to the unit's inherent large shaft float. The sensor steadily output vibration and displacement data, successfully capturing early thrust bearing wear trends. The maintenance team completed targeted overhaul during planned shutdown, avoiding major rubbing failure of the rotor system.

• Export to 40+ countries
• Complete after-sales service
• Stable supply chain ensuring continuous availability
• COO, COC and CQ certification support
• Rapid quotation response

• IOCN 200-566-000-112
• IOC4T 200-560-000-113
• IOC4T 200-560-000-111
• RPS6U 200-582-200-013
• CPUM 200-595-045-114
• 3500/32M 149986-02
• IS200ESELH3AAA
• IS200EPCTG1AAA
• IS200EXHSG3AEC
• IS220PSVOH1A

• Professional installation required for optimal performance and safety
• Ensure proper mounting and adequate ventilation
• Comply with all applicable electrical safety standards