21504-00-16-10-02 | Bently Nevada 8 mm Proximity Probe Vibration Transducer

Introduction to the 21504-00-16-10-02 Proximity Probe

When rotating machinery vibration threatens uptime, the 21504-00-16-10-02 from Bently Nevada provides reliable measurement. This 8 mm diameter probe is part of the 7200 Proximity Transducer Systems family. It offers a calibrated range of 80 mils (2.0 mm), starting at approximately 10 mils from the probe face. Engineers trust this model for its consistent scale factor of 200 mV/mil, ensuring accurate data for predictive maintenance.

Key Features and Technical Specifications

• Input power: -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
• Scale factor: 200 mV/mil (7.87 V/mm) with ±4% accuracy when calibrated as a system.
• Linearity: Within 0.8 mils of a 200 mV/mil straight line as a system.
• Frequency response: 0 to 10 kHz (0 to 600,000 cpm) with -5% at 10 kHz.
• Operating temperature for probe and extension cable: -30°F to +350°F (-34°C to +177°C).
• System weight: 1.3 lbs (0.59 kg).
• Total length: 1.0 metre (39 inches) with tolerance.
• Connector option: miniature male coaxial connector.

A distinctive spec is the temperature sensitivity: typically -3% change in scale factor at +150°F (+65°C) at 50 mils gap. This means field performance remains stable even in hot environments.

Real-World Applications

In turbomachinery and compressor monitoring, the 21504-00-16-10-02 excels. Its corrosion resistance to air, water, lube oil, and chemicals like MEK or DMF suits harsh industrial settings. For example, in a refinery, this probe withstands direct contact with sulfuric acid (10%) without affecting operation. Consequently, it reduces false alarms and maintenance costs.

Installation and Setup Guide

Mount the probe with a 3/8-24 thread into a standard case. Ensure the unthreaded length is 0 mm. Connect the miniature male coaxial connector to the proximitor. Verify the gap starts at approximately 10 mils from the target. Use the -17.5 Vdc to -26 Vdc power supply at 12 mA maximum. Follow Bently Nevada guidelines for cable routing to avoid noise.

Maintenance and Reliability

Periodically inspect the probe face for contamination. The system operates in up to 95% noncondensing humidity. Because the probe and cable handle -30°F to +350°F, they suit extreme conditions. Regular calibration checks ensure the scale factor stays within ±4%. This proactive approach extends service life and minimizes downtime.

Compatibility and Integration

The 21504-00-16-10-02 integrates with Bently Nevada 7200 series proximitors and monitoring systems. It works with standard 8 mm probe extensions. For system calibration, use the provided scale factor and linearity data. Refer to official documentation for full compatibility details.

Common Questions About the 21504-00-16-10-02

Q: What is the calibrated range of this probe?

A: The calibrated range is 80 mils (2.0 mm), beginning at approximately 10 mils from the probe face.

Q: What power supply does the 21504-00-16-10-02 require?

A: It requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.

Q: What is the frequency response?

A: The frequency response is 0 to 10 kHz (0 to 600,000 cpm) with -5% at 10 kHz.

Q: What is the operating temperature for the probe?

A: The probe and extension cable operate from -30°F to +350°F (-34°C to +177°C).

Q: Is the probe resistant to chemicals?

A: Yes, for 8 mm probes, operation is not affected by air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, or DMF.

Product Support and Availability

The 21504-00-16-10-02 is available in new, original factory packaging from Petro Auto Tech. It comes with a 12-month factory warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.