Bently Nevada 330878-50-00 Proximity Sensor

The Bently Nevada 330878-50-00 is a high-performance proximity sensor within the 3300 XL transducer family. This specialized 50mm system measures large-scale displacement and differential expansion on heavy industrial machinery. It utilizes non-contact eddy current technology to track shaft movement with extreme precision. Because it offers a much wider linear range than standard 8mm probes, it excels at monitoring large thermal growth. This sensor remains a critical component for protecting high-value rotating assets in power and oil industries.

Essential Technical Specifications

The following parameters define the operational boundaries and physical characteristics of the 330878-50-00 system.

• Model Number: 330878-50-00
• Sensor Tip Diameter: 50 mm (1.97 inches)
• Linear Range: 27.9 mm (1100 mils)
• Standard Target Material: AISI 4140 steel
• System Type: 3300 XL 50mm Transducer System
• Operating Temperature: -35 °C to +177 °C
• Sensitivity: 0.394 V/mm (100 mV/mil)
• Compliance: Hazardous area approvals available for global regions

Advanced Engineering and Durability

The 50mm sensor features a rugged construction designed for the most volatile industrial environments. It employs a high-strength case to resist chemical exposure and physical impact. Furthermore, the internal coil design minimizes the effects of side-wall interference. This ensures accurate readings even when mounting space is limited near large machine housings. The system maintains excellent thermal stability throughout its entire operating range. Consequently, operators receive consistent data despite significant ambient temperature fluctuations.

Primary Industrial Applications

Maintenance teams typically deploy this transducer on very large steam turbines and generators. It specifically monitors differential expansion between the machine rotor and stator. Additionally, it tracks the axial position of massive shafts during startup and shutdown cycles. Because it handles extensive displacement, it is ideal for hydroelectric turbines and large industrial fans. The 330878-50-00 provides the necessary data to prevent catastrophic internal contact between rotating and stationary parts.

Operational Benefits and Maintenance

This sensor integrates seamlessly with Bently Nevada 3500 series machinery protection racks. It supports proactive maintenance strategies by providing real-time trend analysis of mechanical clearances. Moreover, the long-range capability reduces the need for frequent probe gap adjustments. This stability decreases the time required for scheduled maintenance turnarounds. By detecting abnormal expansion patterns early, the system helps avoid expensive unplanned outages. Choosing this genuine Bently Nevada component ensures long-term reliability for critical infrastructure.