21500-00-24-10-02 | Bently Nevada 5 mm Proximity Probe Vibration

Introduction to the 21500-00-24-10-02

When machinery vibration threatens uptime, the 21500-00-24-10-02 from Bently Nevada provides precise measurement. This standard 5 mm diameter proximity probe is part of the 21504 7200 Proximity Transducer System. It offers a calibrated range of 80 mils (2.0 mm) starting at approximately 10 mils from the probe face. Maintenance engineers value its robust design for continuous monitoring.

Key Features and Technical Specs

• Scale factor: 200 mV/mil (7.87 V/mm), ±4% 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: 0 to 10 kHz (0 to 600,000 cpm); -5% at 10 kHz.
• Power input: -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
• Operating temperature for probe and cable: -30°F to +350°F (-34°C to +177°C).
• Relative humidity: To 95%, noncondensing.
• System weight: 1.3 lbs (0.59 kg).

A distinctive spec is the 200 mV/mil scale factor, which ensures consistent vibration readings across the calibrated range. This precision helps maintenance teams detect early bearing wear or imbalance.

Applications and Use Cases

This proximity probe excels in rotating machinery monitoring, such as turbines, compressors, and pumps. Therefore, it helps prevent unplanned downtime by providing real-time shaft vibration data. In addition, its temperature tolerance suits harsh industrial environments. Consequently, engineers rely on it for critical asset protection.

Installation and Setup

Mount the probe with 1/4-28 threads into a suitable mounting block. Ensure the unthreaded length is 0 mm and overall case length is 2.4 inches. The total cable length is 1.0 meter (39 inches) with a miniature male coaxial connector. For best results, calibrate the probe with its proximitor as a system to achieve ±4% scale factor accuracy.

Maintenance and Reliability

Inspect the probe and cable periodically for physical damage or corrosion. The probe resists air, water, lube oil, ammonium hydroxide, and sulfuric acid (10%) for 8 mm probes. Keep the tip clean and free from debris. Regular verification of the scale factor ensures long-term measurement accuracy.

Compatibility and Integration

The 21500-00-24-10-02 integrates with Bently Nevada 7200 series monitoring systems. Use it with compatible proximitors and extension cables for a complete vibration measurement chain. The coaxial connector simplifies wiring in existing panels.

Frequently Asked Questions

Q: What is the calibrated range of the 21500-00-24-10-02?

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

Q: What power supply does this probe require?

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

Q: What is the frequency response of this proximity probe?

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 and cable?

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

Q: How do I verify the scale factor accuracy?

A: Calibrate the probe as a system with its proximitor to achieve ±4% scale factor accuracy. Refer to official Bently Nevada documentation for detailed procedures.

Product Support and Availability

The 21500-00-24-10-02 is available in new and 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.