Critical Machinery Displacement Intelligence

The Bently Nevada 330710-004-054-50-02-00 11mm Proximity Probe provides an extended linear range essential for monitoring large-scale rotating machinery where standard 8mm probes fall short. Specifically optimized for axial thrust position and radial vibration in steam turbines, large compressors, and heavy-duty generators, this 11mm transducer system offers a significantly wider measurement window. Its primary value lies in its ability to deliver precise, non-contacting displacement data even in environments characterized by extreme thermal expansion or large shaft excursions. By ensuring high-resolution signal transmission to the Bently Nevada 3500 monitoring rack, this probe acts as a vital early-warning component, preventing catastrophic mechanical failure and supporting automated emergency shutdown (ESD) logic within modern DCS environments.

Suffix Logic and Technical Parameters

330710 - 3300 XL 11mm Proximity Probe

Defines the high-performance 11mm sensor head designed for an extended linear range of 4.0 mm (160 mils), utilizing a 1/2-20 UNF threaded body.

004 - Unthreaded Length

Specifies an unthreaded length of 0.4 inches (10.2 mm). This allows for specific mounting depth requirements in bearing housings where a partial smooth shank is necessary.

054 - Overall Case Length

Indicates a total threaded case length of 5.4 inches (137.2 mm). This long-body configuration provides extensive reach for deep-well mounting or through-casing installations.

50 - Total Length Option

Designates a 5.0 meter (16.4 feet) total electrical length. This probe is calibrated as a complete unit that interfaces directly with a 5.0m Proximitor sensor without requiring additional extension cables.

02 - Connector and Cable Option

Equipped with a miniature coaxial ClickLoc connector and standard cable. The ClickLoc mechanism ensures a moisture-resistant, high-integrity electrical bond that resists loosening under intense machinery vibration.

00 - Agency Approval

Standard approval for non-hazardous locations or general-purpose industrial deployments where explosion-proof certifications are not mandated.

Performance and Dimensional Specifications

Strategic Installation and Gapping

Setting the 11mm probe requires precision to utilize its full 160-mil linear range. Field engineers must use a digital voltmeter to monitor the Proximitor output; adjust the probe until the bias voltage reads approximately -10 VDC, marking the center of the linear region. Due to the 5.4-inch case length, ensure the probe is securely locked with the provided nut to prevent mechanical drift caused by thermal cycling. Always maintain a minimum bend radius of 25.4 mm (1.0 inch) for the coaxial lead to prevent internal conductor fatigue, and ensure the connector junction remains clean and oil-free to avoid signal attenuation.

Engineering Advantages in Harsh Environments

The 330710-004-054-50-02-00 excels in high-temperature steam environments where chemical resilience is mandatory. The probe tip, constructed from advanced Polyphenylene Sulfide (PPS), resists corrosion and fluid ingress, maintaining calibration stability even in pressurized oil-mist atmospheres. This sensor integrates seamlessly with the Bently Nevada 3500/40M or 3500/42M modules, providing a robust data stream for Turbine Supervisory Instrumentation (TSI). Its extended range capability makes it the preferred choice for monitoring thrust collars on large utility turbines, where smaller probes might go "out of range" during startup transients.

Supply and Logistics Standards

Delivery time: 3-5 days when payment finish, BY DHL/FEDEX/UPS.

We ship all 11mm probes in anti-static industrial packaging. Each unit features a protected tip sleeve and connector caps to ensure factory-calibrated signal integrity is maintained from our facility to your plant site.

Technical Field FAQs

Q1: Why use an 11mm probe instead of the standard 8mm version?

A1: The 11mm probe offers double the linear range (160 mils vs 80 mils). This is critical for axial position monitoring on large shafts where movement can exceed the measurement limits of an 8mm sensor.

Q2: Does this 5.0m probe require a separate extension cable?

A2: No. The "50" suffix indicates this is a 5.0-meter total length system. It should be connected directly to a 5.0m Proximitor to maintain correct system capacitance and calibration.

Q3: Is the sensitivity of the 11mm probe different?

A3: Yes. Standard 11mm systems have a sensitivity of 100 mV/mil (3.94 V/mm), whereas 8mm systems typically operate at 200 mV/mil. Ensure your 3500 monitor software is configured for the correct 11mm scale factor.