Product Overview

The Bently Nevada 21504-00-52-10-02 is a robust 8mm proximity probe designed for demanding industrial vibration monitoring applications. As an integral component of the legacy 3300 Proximity Transducer System, this probe is engineered to deliver highly accurate, non-contact measurements of shaft radial vibration, axial thrust position, and rotor speed.

In critical machinery environments—such as power generation turbines, centrifugal compressors, and industrial blowers—the 21504 series probe provides the essential data required for condition-based maintenance. Its high linearity and frequency response ensure that machine protection systems receive clean, reliable signals, preventing costly unplanned outages. When you buy this genuine Bently Nevada part, you are investing in decades of proven engineering excellence, ensuring that your machinery protection loop maintains its factory-certified performance levels.

Key Features

• Non-Contact Precision: The 8mm tip diameter provides excellent sensitivity for detecting minute changes in the gap between the probe tip and the target shaft.

• Rugged Industrial Design: Built to withstand the harsh conditions of turbine enclosures, including exposure to lube oils, high temperatures, and high-pressure steam/gases.

• Industry-Standard Linearity: Calibrated to ensure a linear output, which is critical for consistent alarm and shutdown setpoints in protection racks.

• Legacy System Support: Specifically designed for seamless integration with the established 3300-series transducer infrastructure, allowing for easy replacement and maintenance.

• High EMI Immunity: Engineered with shielded cabling to minimize noise interference, providing high signal-to-noise ratio performance even in electrically noisy industrial areas.

Technical Specifications

Model Configuration Explanation

The part number 21504-00-52-10-02 is categorized to define specific mechanical dimensions and connectivity options:

• 21504: Base model identifier for 8mm proximity probes in the 3300 series.

• -00: Indicates 0mm of unthreaded length.

• -52: Specifies the overall probe case length (52mm).

• -10: Denotes a 1.0-meter system length.

• -02: Standard coaxial connector type for integration into the 3300 system loop.

Typical Applications

• Radial Vibration Monitoring: Identifying bearing wear, shaft misalignment, and rotor instability in steam and gas turbines.

• Axial Position (Thrust) Monitoring: Detecting thrust bearing wear in compressors to prevent catastrophic blade-to-casing contact.

• Rotor Speed Measurement: Capturing accurate keyphasor data for phase analysis and balancing of rotating equipment.

• High-Speed Industrial Pumps: Providing essential health metrics for pumps operating under high-load/high-pressure conditions.

System Compatibility

The 21504-00-52-10-02 probe is fully compatible with the Bently Nevada 3300 system series, including associated Proximitor sensors, extension cables, and monitoring racks (such as the 3300 and 3500 series when properly integrated). Proper system length matching (probe, extension cable, and Proximitor) is mandatory to maintain the linearity and accuracy of your vibration measurements.

Installation Guidelines

1. Housing Preparation: Ensure the mounting hole is cleaned of debris and the threads match the probe specifications.

2. Gap Setting: Use a high-quality digital multimeter to monitor the DC gap voltage at the Proximitor output. The standard practice is typically setting the gap to -1.25 Vdc, though specific machine requirements may vary.

3. Locking: Once the optimal gap is reached, firmly tighten the jam nut. Use a thread locking compound if required by site safety standards to prevent loosening due to machinery vibration.

4. Cabling: Route the coax cable through protective conduits, avoiding sharp bends that could cause internal shielding damage.

5. Validation: Conduct a full loop verification check to ensure that physical probe displacement translates into the expected electrical signal in your control rack.

Product Advantages

Choosing genuine Bently Nevada parts through Maxwell PLC provides:

• Guaranteed Compatibility: No guesswork regarding signal response curves or connector interface compatibility.

• Regulatory Compliance: Our genuine parts meet API 670 standards, which is often a requirement for insurance and safety auditing in industrial plants.

• Reliability: Reduced risk of "infant mortality" or signal drift associated with counterfeit/repaired sensors.

Ordering Information

As an experienced Bently Nevada supplier, we keep the 21504-00-52-10-02 in stock to assist with emergency maintenance and plant shutdowns. Please contact our sales team to request a quote or to verify bulk pricing options. Our goal is to provide the Industrial Automation Spare Parts you need with the shortest possible lead time.

Logistics and Shipping

Safety is paramount when handling sensitive electronic sensors. Every 21504 probe is packed in anti-static industrial packaging to prevent electrostatic discharge damage and buffered with impact-resistant materials to ensure it reaches your facility in factory-perfect condition. We provide global tracking for all shipments departing from our Xiamen, China logistics hub.

Why Choose Maxwell PLC

Maxwell PLC offers a unique blend of technical expertise and supply chain efficiency. With 50 years of collective experience, we are not just a supplier; we are your partners in machine protection. We pride ourselves on having genuine parts in stock and providing the technical documentation you need to ensure a successful installation.

Frequently Asked Questions

• Is the 21504-00-52-10-02 in stock?

  Yes, we maintain an active inventory of this model to support urgent client needs.

• What is the current price for this proximity probe?

  Prices fluctuate based on inventory levels and procurement volume. Contact us for a formal quotation today.

• Are these genuine Bently Nevada parts?

  Yes, we supply 100% authentic Bently Nevada products, ensuring full compatibility with your systems.

• Can I replace a legacy 3300 probe with this one?

  Yes, it is designed for the 3300 series system; verify your total system length requirements before ordering.

• What is the shipping lead time?

  Most in-stock orders are processed and dispatched within 24 hours of confirmation.

• Do you provide shipping worldwide?

  Yes, we ship to all major industrial locations globally via reputable courier services.

• How do I ensure the system is correctly calibrated?

  We provide technical resources and can guide you through the calibration process for the 3300 system.

• Is the probe suitable for hazardous areas?

  This specific part number configuration does not carry hazardous area ratings; please contact us if you require ATEX/CSA-rated versions.

• What if the probe is damaged during installation?

  Proper installation is critical. We recommend following the Bently Nevada user manual strictly to avoid voiding component integrity.

• Do you offer technical support for probe selection?

  Absolutely. Our engineering team can help you review your machine drawings to confirm the correct probe configuration.

Related Models

• 21504-00-52-05-02 (0.5m system length)

• 330103-00-06-10-02-00 (3300 XL alternative)

• 330180-50-00 (3300 XL Proximitor)

• 330130-080-10-00 (8m Extension Cable)