Competitive Comparison: Bently Nevada 21505-00-12-05-02 vs. Standard Probes
When selecting a proximity probe for critical rotating machinery, the Bently Nevada 21505-00-12-05-02 stands apart due to its precise engineering and robust environmental tolerance. This 8 mm probe is part of the 7200 Proximity Transducer Systems, designed for reliable vibration and position measurement in harsh industrial environments.
Technical Specifications Breakdown
Key parameters for the 21505-00-12-05-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21505 7200 Proximity Transducer Systems |
| Unthreaded Length Option | 00 0 mm |
| Overall Case Length Option | 12 120 mm |
| Total Length Option | 05 0.5 metre (20 inches). Tolerance: +.13 metre,-.05 metre (+ 5 inches, -2 inches) |
| Connector Option | 02 With miniature male coaxial connector |
| Diameter | 8 mm |
| Case Configuration Type Threads | Standard 318-24 |
| Lead Armor | Yes (stainless steel) |
| Input 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, Within ±9.5% including interchangeability errors |
| Linearity | Within 0.8 mils (0.02 mm) of a 200 mV/mil straight line if calibrated as a system. Within 2.3 mils (0.06 mm) of a 200 mV/mil straight line including interchangeability errors |
| Frequency Response | 0 to 10 kHz (0 to 600,000 cpm); -5% at 10 kHz (600,000 cpm) |
| Temperature Sensitivity | Typically -396 change in scale factor at +150°F (+65°C) at 50 mils gap (1.27 mm) |
| Operating Temperature (Proximitor) | -60°F to +212°F (-51°C to +100°C) |
| Operating Temperature (Probe and Extension Cable) | -30°F to +350°F (-34°C to +177°C) |
| Relative Humidity | To 95%, noncondensing |
| Corrosion Resistance (8 mm probes only) | Probe operation not affected by direct contact to air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, or DMF |
| System Weight | 1.3 lbs. (0.59 kg) |
Industry Applications
Its 0 to 10 kHz frequency response captures both low-speed shaft runout and high-speed vibration events up to 600,000 cpm. The calibrated range of 80 mils (2.0 mm) provides ample measurement span for most rotating machinery clearances.
Installation & Setup Guidance
When installing the 21505-00-12-05-02, ensure the probe face gap starts at approximately 10 mils (0.25 mm) for the beginning of the calibrated range. Use the miniature male coaxial connector for secure signal transmission. The unthreaded length option (0 mm) requires careful positioning within the mounting hole. Always verify the total length tolerance (+.13 metre, -.05 metre) to avoid interference with rotating components.
Maintenance & Reliability
The probe and extension cable operate reliably from -30°F to +350°F (-34°C to +177°C), while the Proximitor handles -60°F to +212°F (-51°C to +100°C). Periodic inspection of the lead armor and connector integrity is recommended. The noncondensing humidity limit of 95% ensures stable performance in humid environments. No special maintenance beyond visual checks is required.
Compatibility & Integration
This probe is designed for use with Bently Nevada 7200 Proximitor systems. The 200 mV/mil scale factor (7.87 V/mm) is standard for Bently Nevada monitoring systems, allowing direct integration with existing vibration monitoring racks. The miniature male coaxial connector is compatible with standard Bently Nevada extension cables.
Selection Guide & Purchasing Advice
When ordering the 21505-00-12-05-02, verify the total length option (0.5 metre) and connector type (miniature male coaxial). AutoDCSTech offers this probe new and original in factory packing with a 12-month warranty. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21505-00-12-05-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
