Description

Bently Nevada 330851-02-000-070-90-00-05 3300 XL 11mm Proximity Transducer

The Bently Nevada 330851-02-000-070-90-00-05 is a high-performance 11mm proximity probe designed for non-contacting displacement and vibration measurements. As a core component of the 3300 XL transducer series, this probe is specifically engineered for applications requiring a wider linear range than standard 8mm probes. It converts the physical distance between the probe tip and the target shaft into a proportional electrical signal, allowing for the precise monitoring of axial position and radial vibration in high-speed rotating machinery. Its design is fully compliant with API 670 standards, ensuring high-fidelity data for machinery protection systems.

Robust Engineering and Material Integrity

Designed for the rigors of heavy industrial environments, the 330851 series features a ruggedized construction that maintains signal stability under extreme conditions. Specifically, the probe tip is hermetically sealed to prevent the ingress of industrial fluids, while the 300-series stainless steel case provides superior corrosion resistance. Furthermore, the high-quality coaxial cable is optimized to minimize electrical noise and signal attenuation. In addition, the probe is built to withstand high levels of electromagnetic interference (EMI) and temperature fluctuations. Consequently, this transducer provides reliable, long-term performance in turbine housings, gearboxes, and compressor stations.

Technical Specification Matrix

Critical Asset Monitoring and Maintenance

The 330851-02-000-070-90-00-05 is a vital element of Turbine Supervisory Instrumentation (TSI) for large-scale industrial assets. As a result, it is frequently deployed on steam and gas turbines where shaft movement may exceed the range of smaller sensors. Moreover, the probe’s 11mm tip provides a broader linear measurement window, which is essential for accurate thrust position monitoring during machine start-up and thermal expansion. Therefore, by integrating this sensor with Bently Nevada 3500 series monitors, plant operators can implement effective predictive maintenance programs. Ultimately, this specialized proximity probe enhances plant safety by identifying mechanical anomalies before they lead to expensive downtime.

FAQ

Why is an 11mm probe used instead of an 8mm probe?

The 11mm probe tip offers a larger linear range, typically up to 4.0 mm (160 mils), whereas 8mm probes are limited to 2.0 mm (80 mils). Specifically, this makes it the preferred choice for thrust position monitoring where significant axial movement is expected. Accordingly, it provides a greater safety margin for monitoring thermal growth in large turbines.

What are the benefits of the ClickLoc connector system?

The ClickLoc connector provides a secure, self-locking interface that prevents the coaxial connection from loosening due to machine vibration. In addition, the gold-plated surfaces eliminate the risk of contact oxidation. Consequently, you receive a consistent, low-noise signal throughout the operational life of the sensor.

Can this probe be installed in hazardous zones?

Yes, Bently Nevada proximity probes are certified for use in hazardous areas globally. Specifically, they carry ATEX, IECEx, and CSA ratings for intrinsic safety when installed with appropriate Proximitor sensors and safety barriers. Therefore, they are safe for deployment in refineries and chemical processing plants.

Does the 7.0-meter length include the extension cable?

No, the 7.0-meter specification refers to the total length of the probe lead itself. However, the 3300 XL 11mm system is typically calibrated for a total length of 9.0 meters. As a result, you must use a 2.0-meter extension cable to complete the calibrated circuit and ensure accurate voltage output.