Technical Specifications Breakdown
Key parameters for the 21508-02-12-50-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21508 7200 Proximity Transducer Systems |
| Tip Diameter | 8 mm |
| Total Cable Length | 5 metre (195 inches) — Tolerance: +0.6 metre, -0.5 metre (+24 inches, -20 inches) |
| Connector Option | With miniature male coaxial connector |
| Threads | 3/8-24 |
| Power Input | -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% (system calibrated); ±9.5% including interchangeability errors |
| Frequency Response | 0 to 10 kHz (0 to 600,000 cpm); -5% at 10 kHz (600,000 cpm) |
| Operating Temperature (Probe) | -30°F to +350°F (-34°C to +177°C) |
| System Weight | 1.3 lbs. (0.59 kg) |
Application in Rotating Machinery
Its 8 mm tip and reverse case configuration allow installation in tight spaces. The 200 mV/mil scale factor provides clear, linear output for trend analysis and alarm thresholds. With a frequency response up to 10 kHz, it captures both low-speed and high-speed vibration events.
Installation Guidance for Maintenance Teams
When installing the 21508-02-12-50-02, ensure the probe face is positioned within the calibrated range (starting at approximately 10 mils from the target surface). Use the 3/8-24 threaded mounting to secure the probe. The miniature male coaxial connector simplifies cabling to the proximitor. Verify power supply is within -17.5 Vdc to -26 Vdc at 12 mA maximum to avoid damage.
Environmental Durability and Reliability
The probe and extension cable operate from -30°F to +350°F, making them suitable for high-temperature areas near bearings or steam paths. The probe resists corrosion from air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, and DMF. Relative humidity up to 95% noncondensing is acceptable. These traits reduce maintenance frequency in aggressive environments.
Reliable Vibration Monitoring with the Bently Nevada 21508-02-12-50-02
For maintenance engineers, accurate vibration sensing is critical to preventing unplanned downtime. The Bently Nevada 21508-02-12-50-02 is a precision 8 mm proximity probe designed for continuous vibration monitoring in rotating machinery. This component is part of the trusted 7200 Proximity Transducer Systems and delivers dependable performance in harsh industrial environments.
Compatibility and System Integration
This probe is designed for the Bently Nevada 7200 Proximitor system. It uses a reverse mount configuration and does not include lead armor. The 5-metre cable length with miniature coaxial connector provides flexibility for routing to the monitoring rack. Always pair with a compatible Bently Nevada proximitor for optimal linearity and interchangeability.
Purchasing from AutoDCSTech
AutoDCSTech stocks the Bently Nevada 21508-02-12-50-02 as new and original in factory packing. Each unit comes with a 12-month factory warranty. Please verify current lifecycle status and availability before ordering. Contact our team for bulk pricing or expedited shipping options.
Availability & Condition at AutoDCSTech
| Part Number | 21508-02-12-50-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
