21504-00-24-05-02 | Bently Nevada 8 mm Proximity Probe Vibration

Introduction to the Bently Nevada 21504-00-24-05-02

When machine vibration threatens uptime, the 21504-00-24-05-02 from Bently Nevada provides accurate, real-time data. This 8 mm proximity probe is part of the 7200 Proximity Transducer Systems family. It is engineered for continuous monitoring in harsh industrial environments.

Key Features and Technical Specifications

• Calibrated range of 80 mils (2.0 mm) begins at approximately 10 mils (0.25 mm) from the probe face.
• Scale factor of 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 as a system.
• Frequency response from 0 to 10 kHz (0 to 600,000 cpm) with -5% at 10 kHz.
• Power input: -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
• 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).

Real-World Applications for the 21504-00-24-05-02

This proximity probe excels in rotating machinery monitoring. It is ideal for turbines, compressors, and pumps where early vibration detection prevents catastrophic failure. The 8 mm diameter tip fits standard mounting configurations. Its corrosion resistance to air, water, lube oil, and several chemicals makes it suitable for refinery and chemical plant use. By delivering consistent scale factor accuracy, it supports predictive maintenance programs that reduce downtime.

Installation and Setup Guidance

Mount the probe using the standard 3/8-24 thread. Ensure the unthreaded length is 00 mm and overall case length is 2.4 inches. The total length of 0.5 metre (20 inches) includes a tolerance of +.13 metre, -.05 metre. Connect using the miniature male coaxial connector (option 02). Verify the gap setting starts at approximately 10 mils from the probe face for optimal linear range.

Maintenance and Reliability Tips

Periodically inspect the probe and cable for physical damage. Keep the probe face clean and free from debris. The system operates reliably in relative humidity up to 95% noncondensing. For long-term accuracy, verify calibration as a system periodically. Follow Bently Nevada guidelines for routine checks to maintain the 12-month factory warranty.

Frequently Asked Questions about the 21504-00-24-05-02

Q: What is the calibrated range of the 21504-00-24-05-02?

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

Q: What is the scale factor and its accuracy?

A: The scale factor is 200 mV/mil (7.87 V/mm) with ±4% accuracy when calibrated as a system.

Q: What power supply does the proximity probe require?

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

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).

Q: What is the frequency response of this probe?

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

Product Support and Availability

The 21504-00-24-05-02 is available as new and original in factory packing from Petro Auto Tech. Please verify current lifecycle status and availability before ordering. Our team can assist with technical questions and ordering details.