21504-16-28-10-02 | Bently Nevada 8 mm Probe Proximity Vibration Transducer

Introduction to the 21504-16-28-10-02

When industrial machinery requires precise vibration monitoring, the 21504-16-28-10-02 from Bently Nevada provides a proven solution. This 8 mm probe proximity transducer system is part of the 7200 series, engineered for accurate shaft displacement measurement. With a calibrated range of 80 mils (2.0 mm) and a scale factor of 200 mV/mil, it delivers consistent performance in demanding environments.

Key Features & Technical Specs

• Power: Operates on -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
• Calibrated Range: 80 mils (2.0 mm), beginning at approximately 10 mils (0.25 mm) from probe face.
• Scale Factor: 200 mV/mil (7.87 V/mm) with ±4% accuracy when calibrated as a system.
• Linearity: Within 0.8 mils (0.02 mm) of a 200 mV/mil straight line when calibrated as a system.
• Frequency Response: 0 to 10 kHz (0 to 600,000 cpm) with -5% at 10 kHz.
• Temperature Sensitivity: Typically -3% change in scale factor at +150°F (+65°C) at 50 mils gap.
• Operating Temperature: Proximitor: -60°F to +212°F (-51°C to +100°C); Probe and Extension Cable: -30°F to +350°F (-34°C to +177°C).
• Relative Humidity: Up to 95%, noncondensing.
• System Weight: 1.3 lbs (0.59 kg).

Real-World Applications

In rotating machinery monitoring, the 21504-16-28-10-02 excels at detecting shaft vibration and position. It is commonly used in turbines, compressors, and pumps where reliable proximity sensing is critical. This transducer system helps prevent unplanned downtime by providing early warning of mechanical issues.

Installation & Setup

Mount the 8 mm probe with 3/8-24 threads securely in a bracket or housing. Ensure the probe face is positioned within the calibrated range of approximately 10 mils from the target surface. Connect the miniature male coaxial connector to the Proximitor, and verify power supply between -17.5 Vdc and -26 Vdc. Follow Bently Nevada guidelines for cable routing to avoid interference.

Maintenance & Reliability

Regularly inspect the probe and cable for physical damage or corrosion. The probe resists direct contact with air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, or DMF. Check system calibration periodically to ensure scale factor remains within ±4% for optimal accuracy.

Compatibility & Integration

The 21504-16-28-10-02 integrates with Bently Nevada 7200 series Proximitor systems. It works with standard monitoring racks and data acquisition platforms that accept 200 mV/mil input signals. Ensure compatibility with your existing monitoring system by verifying input range and connector type.

FAQs about the 21504-16-28-10-02

Q: What is the power requirement for the 21504-16-28-10-02?

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

Q: What is the calibrated range of this probe?

A: The calibrated range is 80 mils (2.0 mm), starting at approximately 10 mils (0.25 mm) from the probe face.

Q: What is the frequency response of the 21504-16-28-10-02?

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 range for the probe?

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

Product Support & Availability

The 21504-16-28-10-02 is available in stock and ready to ship from Petro Auto Tech. Contact our team for ordering details and lead times.