Bently Nevada 21504-12-28-10-02 Proximity Probe Vibration Transducer System

Technical Specifications Breakdown

Key parameters for the 21504-12-28-10-02 are listed below for quick reference:

Industry Applications for Vibration Monitoring

The 0 to 10 kHz frequency response covers both low-speed and high-speed rotating equipment up to 600,000 cpm. The corrosion-resistant design allows use in harsh environments with exposure to water, lube oil, and mild chemicals. Operators rely on the 200 mV/mil output for direct trend analysis and alarm setpoints.

Installation and Setup Guidance

Mount the 21504-12-28-10-02 probe with the 3/8-24 thread into a rigid bracket or machine case. Ensure the probe face is positioned to begin the calibrated range at approximately 10 mils (0.25 mm) from the target surface. Total cable length is 1.0 metre with a miniature male coaxial connector. Use the specified -17.5 Vdc to -26 Vdc power supply at 12 mA maximum. For best linearity, calibrate the probe with its proximitor as a complete system.

Maintenance and Reliability

The probe and extension cable operate from -30°F to +350°F (-34°C to +177°C). The proximitor handles -60°F to +212°F (-51°C to +100°C). These wide temperature ranges suit outdoor and high-heat applications. The noncondensing humidity limit of 95% ensures stable performance in humid environments. Inspect the probe tip and cable periodically for physical damage. No disassembly is required for routine checks.

Proximity Vibration Probe for Critical Machinery Protection

The Bently Nevada 21504-12-28-10-02 is a precision 8 mm proximity probe designed for continuous vibration monitoring in rotating machinery. Part of the 7200 Proximity Transducer Systems, this component delivers reliable displacement measurements essential for early fault detection. With a calibrated range of 80 mils (2.0 mm) and a scale factor of 200 mV/mil (7.87 V/mm), it provides accurate data for trend analysis and machine protection.

Selection Guide and Purchasing Advice

When selecting a replacement or spare proximity probe, verify the unthreaded length (120 mm), overall case length (2.8 in), and connector type (miniature male coaxial). The 21504-12-28-10-02 is supplied new and in original factory packing with a 12-month warranty. AutoDCSTech stocks this Bently Nevada model for immediate shipment. Please verify current lifecycle status and availability with AutoDCSTech before ordering.

Troubleshooting and Common Issues

If the output signal is noisy or unstable, check the power supply voltage between -17.5 Vdc and -26 Vdc. Verify the probe gap is within the calibrated range starting at 10 mils. Inspect the coaxial connector for damage or corrosion. Ensure the target surface is clean and free of debris. For linearity errors beyond 0.8 mils, recalibrate the probe with its proximitor as a system.