Technical Specifications Breakdown
Key parameters for the 21504-00-72-10-02 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Model | 21504 7200 Proximity Transducer Systems |
| Probe Diameter | 8 mm |
| Unthreaded Length Option | 0 mm |
| Overall Case Length Option | 7.2 in |
| Total Length Option | 1.0 metre (39 inches) Tolerance: +.25 metre,-.10 metre (+ 10 inches,-4 inches) |
| Connector Option | With miniature male coaxial connector |
| 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% (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 | Probe operation is 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) |
Critical Applications in Rotating Machinery Protection
The 80 mil (2.0 mm) calibrated range covers typical clearance measurements. With a frequency response from 0 to 10 kHz (0 to 600,000 cpm), it captures both slow roll and high-speed vibration events. The 200 mV/mil scale factor provides a strong signal for early fault detection, reducing unplanned maintenance costs.
Installation Guidance for Reliable Measurements
Mount the probe using the 3/8-24 thread configuration into a rigid, non-magnetic bracket. Ensure the probe face is clean and the target surface is smooth and free of runout. The unthreaded length of 0 mm means the probe body threads directly up to the tip. Connect the miniature male coaxial connector to the extension cable, maintaining proper impedance matching. Power the system with -17.5 Vdc to -26 Vdc at 12 mA maximum. Verify the initial gap is approximately 10 mils (0.25 mm) from the shaft surface to stay within the linear range.
Maintenance and Reliability in Harsh Environments
The probe and extension cable operate from -30°F to +350°F (-34°C to +177°C), making them suitable for hot turbine casings. The Proximitor handles -60°F to +212°F (-51°C to +100°C). With corrosion resistance to common industrial fluids like lube oil and 10% sulfuric acid, the 8 mm probe maintains performance even in aggressive atmospheres. Inspect cables and connectors periodically for damage, and verify the gap voltage during routine shutdowns.
Preventing Machinery Failure with Precision Vibration Monitoring
Unexpected rotating machinery failures cause costly downtime and unsafe operating conditions. The Bently Nevada 21504-00-72-10-02 proximity probe provides the accurate, real-time vibration data needed to detect early signs of bearing wear, shaft misalignment, and imbalance before they escalate into catastrophic breakdowns. This 8 mm probe is engineered for continuous operation in harsh industrial environments.
Selection Guide and Purchasing Advice
When selecting a replacement or spare, confirm the total length option (1.0 metre with tolerance) and connector type match your existing installation. The 21504-00-72-10-02 is supplied new in original factory packing with a 12-month warranty. AutoDCSTech stocks this Bently Nevada proximity probe to support your critical machinery monitoring needs. Contact our team for lifecycle and availability confirmation before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 21504-00-72-10-02 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
