Bently Nevada 21505-20-48-05-02 Proximity Probe Vibration Transducer System

Technical Specifications Breakdown

Key parameters for the 21505-20-48-05-02 are listed below for quick reference:

Industry Applications Driving ROI

Turbine Shaft Monitoring

In steam and gas turbines, the 21505-20-48-05-02 provides continuous radial vibration measurement. Early detection of shaft orbit changes reduces the risk of catastrophic failure, directly lowering maintenance costs and extending equipment life.

Compressor Protection

Centrifugal compressors benefit from the probe's 0 to 10 kHz frequency response, capturing both low-speed and high-speed vibration events. The stainless steel lead armor ensures durability in harsh environments, minimizing replacement frequency.

Pump Vibration Analysis

For critical pumps in oil & gas or water treatment, the 200 mV/mil scale factor enables precise trend analysis. The -17.5 to -26 Vdc input range aligns with standard industrial power supplies, simplifying integration.

Installation & Setup Guidance

Mount the probe using the 3/8-24 thread configuration. Ensure the unthreaded length of 2.0 inches provides adequate clearance. Connect the miniature male coaxial connector to the proximitor. Verify power supply is within -17.5 Vdc to -26 Vdc at 12 mA maximum. Calibrate the system as a pair to achieve ±4% scale factor accuracy. The calibrated range begins at approximately 10 mils from the probe face; set the initial gap accordingly.

Maintenance & Reliability

Inspect the probe face and lead armor periodically for contamination or damage. The probe resists corrosion from air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, and DMF. Operating temperature limits are -30°F to +350°F for the probe and cable. Relative humidity up to 95% noncondensing is acceptable. No disassembly is required for routine checks.

Cost-Effective Vibration Monitoring with the Bently Nevada 21505-20-48-05-02

Industrial rotating machinery requires precise vibration measurement to prevent unplanned downtime and costly repairs. The Bently Nevada 21505-20-48-05-02 proximity probe transducer system delivers reliable, accurate data for asset protection. This 8 mm diameter probe, part of the 7200 series, offers a calibrated range of 80 mils (2.0 mm) starting at approximately 10 mils from the probe face, enabling early detection of shaft displacement.

Compatibility & Integration

The 21505-20-48-05-02 is designed for Bently Nevada 7200 proximity transducer systems. It pairs with compatible proximitors and extension cables. The 0.5 metre total length with coaxial connector suits standard junction box installations.

Selection Guide & Purchasing Advice

When ordering, verify the unthreaded length (20 = 2.0 in), overall case length (48 = 4.8 in), total length (05 = 0.5 metre), and connector option (02 = miniature male coaxial). AutoDCSTech stocks this Bently Nevada probe as new surplus in factory packaging with a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.

Troubleshooting & Common Issues

If output signal is erratic, check power supply voltage between -17.5 Vdc and -26 Vdc. Verify the coaxial connector is fully seated. Confirm the gap is within the calibrated range (10 to 80 mils). For scale factor deviations beyond ±9.5%, recalibrate the system. If frequency response appears degraded, inspect the probe face for debris or damage.