Bently Nevada 330878-91-00 3300 XL 50 mm Proximitor Sensor

The Bently Nevada 330878-91-00 is part of the 3300 XL series of Proximitor sensors manufactured by Baker Hughes (GE Bently Nevada). Engineered for industrial-grade vibration monitoring and machine condition diagnostics, this proximity sensor is specifically designed for applications requiring a larger linear range—up to 50 mm. With robust construction and advanced signal processing, the 330878-91-00 sensor is ideal for monitoring critical rotating machinery in demanding environments such as turbines, compressors, motors, and pumps.

Its 3300 XL technology ensures high precision and long-term reliability with low susceptibility to electrical interference and temperature drift. This sensor is frequently used alongside a Proximitor driver and extension cable, forming a complete proximity transducer system.

Technical Specifications

Product Applications

• Turbomachinery Monitoring – Used extensively in gas and steam turbines to monitor rotor position and shaft vibration.

• Compressors and Pumps – Detects shaft movement and displacement in high-speed compressors and critical process pumps.

• Motors and Generators – Ensures proper alignment and identifies early-stage bearing wear or shaft instability.

• Industrial Gearboxes – Measures axial and radial displacement of shafts under load.

• OEM Machine Building – Integrated into rotating equipment designs by machinery manufacturers.

• Condition-Based Maintenance – Key component in predictive maintenance systems using proximity detection.

Product Advantages

• High Precision and Sensitivity: Provides accurate displacement readings in harsh environments.

• Extended Linear Range: Offers a longer sensing range compared to standard 3300 XL probes (up to 50 mm).

• Rugged Construction: Built with durable stainless steel and high-temperature insulation for long-term reliability.

• Ease of Integration: Compatible with existing Bently Nevada systems using standard connectors and modules.

• EMI/RFI Shielding: Reduced noise and improved signal stability even in electrically noisy installations.

• Wide Temperature Operation: Operates reliably in extreme thermal conditions ranging from -35°C to +177°C.

• Global Certifications: Compliant with industrial standards including CE, ATEX, and RoHS for hazardous environments.

FAQ

1. Q: What is the main purpose of the 330878-91-00 sensor?

   A: It is used for non-contact displacement and vibration monitoring of rotating machinery shafts.

2. Q: Can this sensor be used in high-temperature environments?

   A: Yes, it is designed to operate in temperatures up to 177°C (350°F).

3. Q: Is this sensor compatible with older Bently Nevada monitoring systems?

   A: Yes, it is backward-compatible with most 3300 systems when paired with the correct extension cable and Proximitor module.

4. Q: What type of cable is recommended for this sensor?

   A: The 330130-XXX-00-00 extension cable series is typically used.

5. Q: What is the linear range of this proximity probe?

   A: Approximately 12.7 mm (0.5 in) in its calibrated region, with sensing up to 50 mm.

6. Q: What types of machinery benefit from this sensor?

   A: It is commonly used in turbines, compressors, motors, pumps, and gearboxes.

7. Q: How is the sensor mounted on equipment?

   A: It features threaded mounting (e.g., 1/4-28 UNF), which allows secure installation in a probe holder or bracket.

8. Q: Is this sensor waterproof or dustproof?

   A: It has an IP65 rating when installed with sealed connectors.

9. Q: Does it require a specific orientation for installation?

   A: It should be installed perpendicular to the target shaft surface for optimal accuracy.

10. Q: What makes the 330878-91-00 different from standard 3300 XL probes?

    A: The key difference is its extended sensing range (up to 50 mm), offering more flexibility for large shaft or clearance applications.