Bently Nevada 21504-16-28-10-02 8 mm Proximity Probe for Vibration Monitoring

Technical Specifications Breakdown

Key parameters for the 21504-16-28-10-02 are listed below for quick reference:

Industry Applications and Use Cases

This 8 mm probe is well-suited for monitoring shaft vibration and axial position in steam turbines, centrifugal compressors, and large pumps. Its calibrated range of 80 mils (2.0 mm) and scale factor of 200 mV/mil provide the sensitivity needed to detect early signs of bearing wear, imbalance, or misalignment. The probe's corrosion resistance to air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, and DMF makes it reliable in harsh environments common in oil and gas, power generation, and chemical processing. By using a probe with documented interchangeability errors (within ±9.5% including interchangeability), you can confidently swap probes without full system recalibration, reducing downtime and maintenance costs.

Installation and Setup Guidance

Proper installation is critical for accurate readings. The probe features 3/8-24 threads and a standard case. Ensure the probe face is clean and free of debris before mounting. The total length of 1.0 metre (39 inches) with a tolerance of +.25 metre,-.10 metre allows for flexible positioning relative to the target shaft. Use the miniature male coaxial connector for secure signal transmission. When setting the initial gap, begin at approximately 10 mils (0.25 mm) from the probe face, as this is where the calibrated range starts. For best linearity, calibrate the probe as a system with its Proximitor and extension cable to achieve ±4% scale factor accuracy.

Maintenance and Reliability

Inspect the probe cable and connector periodically for signs of wear or corrosion, especially in high-humidity environments (up to 95% noncondensing). The probe and extension cable can operate from -30°F to +350°F (-34°C to +177°C), making them suitable for applications near hot machinery. Avoid physical damage to the probe tip, as this can alter the gap and degrade measurement accuracy. No special maintenance is required beyond routine visual checks and ensuring the connector remains tightly fastened.

Selecting the Right Proximity Probe for Vibration Monitoring

When protecting critical rotating assets like turbines, compressors, and pumps, the choice of proximity probe directly impacts measurement accuracy and system reliability. The Bently Nevada 21504-16-28-10-02 is an 8 mm proximity probe from the trusted 7200 series, engineered for non-contact shaft vibration and position monitoring. This guide helps you evaluate its specifications against your application requirements, ensuring you select a probe that delivers consistent, trustworthy data.

Selection Guide and Purchasing Advice

When selecting a replacement or spare probe, verify that the unthreaded length (160 mm), overall case length (2.8 in), and total length (1.0 metre) match your installation requirements. The connector option with miniature male coaxial connector is standard for Bently Nevada 7200 systems. If you need a probe for a different shaft diameter or environmental condition, consult AutoDCSTech for compatible options. We stock the Bently Nevada 21504-16-28-10-02 as a new, original factory-packed unit with a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.