21505-000-016-10-02 | Bently Nevada 80 mils Probe Vibration

Introduction to the Bently Nevada 21505-000-016-10-02

When machine vibration threatens uptime, the 21505-000-016-10-02 from Bently Nevada provides the precise measurement you need. This proximity probe is engineered for continuous monitoring in critical rotating equipment, helping you detect issues before they escalate into costly failures.

As part of the Bently Nevada 7200 series, this probe offers reliable performance in demanding industrial environments. Its robust construction and accurate output make it a trusted choice for maintenance teams focused on reducing downtime and extending asset life.

Key Features and Technical Specifications

• Calibrated range of 80 mils (2.0 mm), starting 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.
• Frequency response from 0 to 10 kHz (0 to 600,000 cpm) with -5% at 10 kHz.
• Power requirement: -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
• Operating temperature for the probe and extension cable: -30°F to +350°F (-34°C to +177°C).
• Relative humidity tolerance up to 95%, noncondensing.
• System weight: 1.3 lbs (0.59 kg).

These specifications directly impact your bottom line. For instance, the wide frequency response ensures you capture both low-speed and high-speed vibration events, preventing undetected faults that lead to expensive repairs. The linear output simplifies data interpretation, reducing the time spent on analysis.

Industry Applications and Use Cases

This probe is ideal for monitoring rotating machinery such as turbines, compressors, and pumps. In petrochemical plants, it helps track shaft vibration to avoid unplanned shutdowns. Similarly, in power generation, it supports predictive maintenance programs that lower operational costs.

Because the probe withstands direct contact with air, water, lube oil, and certain chemicals, it suits harsh environments where other sensors fail. This durability translates into fewer replacements and lower lifecycle costs.

Installation and Setup

Proper installation is crucial for accurate readings. Mount the probe with the specified 8 mm diameter and 3/8-24 threads, ensuring the gap is set within the calibrated range. The total length of 1.0 metre (39 inches) with a tolerance of +0.25/-0.10 metre allows flexibility in positioning.

Use the miniature male coaxial connector for a secure connection to the extension cable. Verify that the power supply meets the -17.5 Vdc to -26 Vdc requirement to avoid measurement errors. Always follow the manufacturer's guidelines for gap setting and cable routing.

Maintenance and Reliability

Regular inspection of the probe and cable helps maintain measurement integrity. Check for physical damage or contamination that could affect performance. The stainless steel lead armor protects against wear, but periodic verification is still recommended.

By incorporating this probe into your condition monitoring program, you reduce the risk of catastrophic failures. Early detection of vibration anomalies allows planned maintenance, which is far more cost-effective than emergency repairs.

Compatibility and Integration

The 21505-000-016-10-02 is designed to work with Bently Nevada 7200 proximity transducer systems. It provides a standard 200 mV/mil output that interfaces with most vibration monitoring equipment. Ensure your system is calibrated as a complete unit to achieve the stated accuracy.

For integration guidance, refer to the official Bently Nevada documentation or contact Petro Auto Tech for support.

Troubleshooting and Common Issues

If readings appear unstable, first check the power supply voltage. A drop below -17.5 Vdc can cause erratic output. Also, verify that the probe tip is clean and free from debris, as buildup affects the gap measurement.

Another common issue is cable damage. Inspect the lead armor for kinks or breaks, especially near connection points. Replacing a damaged cable restores performance without replacing the entire probe.

FAQ about the 21505-000-016-10-02

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 power supply does the probe 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: Can this probe operate in humid conditions?

A: Yes, it can operate in relative humidity up to 95%, noncondensing.

Product Support and Availability

The Bently Nevada 21505-000-016-10-02 is available from Petro Auto Tech in new, original factory packing. Contact Petro Auto Tech to confirm current stock and lead times. Our team can assist with technical questions and ordering.