Cost-Effective Vibration Monitoring with the Bently Nevada 21504-24-44-05-02
Industrial rotating machinery requires precise, continuous monitoring to prevent costly unplanned downtime. The Bently Nevada 21504-24-44-05-02 proximity probe delivers accurate vibration and position data, helping operators optimize maintenance schedules and extend equipment life. This 8 mm diameter probe is part of the 7200 Proximity Transducer Systems, engineered for harsh environments where reliability directly impacts operational ROI.
Technical Specifications Breakdown
Key parameters for the 21504-24-44-05-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21504 7200 Proximity Transducer Systems |
| Unthreaded Length Option | 24 (240 mm) |
| Overall Case Length Option | 44 (4.4 in) |
| Total Length Option | 05 (0.5 metre / 20 inches) |
| Connector Option | 02 (with miniature male coaxial connector) |
| Tip Diameter | 8 mm |
| Threads | 3/8-24 |
| Power | -17.5 Vdc to -26 Vdc at 12 mA maximum consumption |
| Calibrated Range | 80 mils (2.0 mm), begins at approximately 10 mils (0.25 mm) from probe face |
| Scale Factor | 200 mV/mil (7.87 V/mm), ±4% (measured in increments of 10 mils over the calibrated range) if calibrated as a system |
| Frequency Response | 0 to 10 kHz (0 to 600,000 cpm); -5% at 10 kHz (600,000 cpm) |
| Operating Temperature (Probe and Extension Cable) | -30°F to +350°F (-34°C to +177°C) |
| System Weight | 1.3 lbs (0.59 kg) |
Industry Applications and Cost Impact
By detecting shaft vibration and position changes early, the 21504-24-44-05-02 helps avoid catastrophic failures that can cost tens of thousands in repairs and lost production. The 0 to 10 kHz frequency response covers most common vibration modes, enabling predictive maintenance strategies that reduce spare parts inventory and emergency service calls.
Installation and Setup Guidance
Mount the probe using the 3/8-24 threaded case into a suitable mounting fixture. Ensure the probe face is positioned within the calibrated range—approximately 10 mils (0.25 mm) from the target surface. The total length option of 0.5 metre (20 inches) with a miniature male coaxial connector simplifies wiring to the proximitor. Verify power supply is within -17.5 Vdc to -26 Vdc at 12 mA maximum consumption before energizing.
Maintenance and Reliability
The probe is designed for continuous operation in demanding conditions. The corrosion-resistant construction for 8 mm probes ensures operation unaffected by air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, or DMF. Regularly inspect the cable and connector for physical damage. Environmental limits allow operation from -30°F to +350°F (-34°C to +177°C) for the probe and extension cable, with relative humidity up to 95% noncondensing.
Compatibility and Integration
The 200 mV/mil scale factor provides consistent output for trend analysis and alarm setpoints. For system calibration, the ±4% accuracy (within ±9.5% including interchangeability errors) ensures reliable data for condition monitoring.
Selection Guide and Purchasing Advice
When selecting a replacement or new probe, verify the unthreaded length (240 mm), overall case length (4.4 in), and total length (0.5 m) match your installation requirements. The 21504-24-44-05-02 is available new and original in factory packing from AutoDCSTech, backed by a 12-month factory warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21504-24-44-05-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
