21505-00-36-10-02 | Bently Nevada 8 mm Proximity Probe

Introduction to the Bently Nevada 21505-00-36-10-02

When machine vibration threatens uptime, the 21505-00-36-10-02 from Bently Nevada provides the precise measurement you need. This 8 mm proximity probe is part of the 7200 series, engineered for reliable shaft vibration and position monitoring in rotating machinery.

With a calibrated range of 80 mils (2.0 mm), the probe delivers a 200 mV/mil (7.87 V/mm) scale factor, ensuring accurate data for predictive maintenance. Its stainless steel lead armor and rugged construction make it suitable for demanding industrial environments.

Key Features of the 21505-00-36-10-02

• Calibrated range: 80 mils (2.0 mm), starting at approximately 10 mils (0.25 mm) from the probe face.
• Scale factor: 200 mV/mil (7.87 V/mm) with ±4% accuracy 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 a 50 mil gap.
• Operating temperature: Proximitor: -60°F to +212°F (-51°C to +100°C); probe and 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).

The 21505-00-36-10-02 includes a miniature male coaxial connector option, making integration straightforward. Its total length of 1.0 metre (39 inches) with a tolerance of +0.25/-0.10 metre ensures consistent installation.

Cost-Efficiency and ROI of the 21505-00-36-10-02

Investing in the 21505-00-36-10-02 reduces unplanned downtime by catching vibration issues early. The 200 mV/mil output provides high-resolution data, allowing maintenance teams to detect bearing wear or misalignment before catastrophic failure.

With a 12-month factory warranty and new original factory packing, this probe offers long-term reliability. Its stainless steel armor resists corrosion from air, water, lube oil, and common chemicals, extending service life and lowering replacement costs.

By integrating this probe into your condition monitoring system, you gain actionable insights that optimize maintenance schedules, reduce labor costs, and improve overall equipment effectiveness.

Applications and Use Cases

The 21505-00-36-10-02 is ideal for monitoring shaft vibration in turbines, compressors, pumps, and motors. Its 8 mm diameter and 3/8-24 thread configuration fit standard mounting holes, simplifying retrofits.

In petrochemical plants, the probe's corrosion resistance ensures stable performance in harsh atmospheres. For power generation, the wide operating temperature range supports both hot and cold environments.

Because the probe begins measuring at 10 mils from the face, it suits applications where clearance is tight, such as gearboxes and high-speed spindles.

Installation and Setup

Mount the 21505-00-36-10-02 using the 3/8-24 threaded case, ensuring the probe face is positioned within the calibrated gap. The total length option of 1.0 metre provides flexibility for routing the cable to the proximitor.

Connect the miniature male coaxial connector to the extension cable, then calibrate the system to achieve the specified 200 mV/mil scale factor. Follow Bently Nevada's installation manual for gap setting and voltage verification.

For best results, use shielded cables and avoid routing near high-voltage lines to prevent interference.

Maintenance and Reliability

Regularly inspect the probe and cable for physical damage or wear, especially in high-vibration areas. Verify the gap and output voltage periodically to ensure accuracy.

The stainless steel armor protects against mechanical stress, while the corrosion-resistant design minimizes environmental degradation. With proper care, the 21505-00-36-10-02 provides years of dependable service.

Because the probe has no moving parts, maintenance is minimal, reducing total cost of ownership.

Compatibility and Integration

The 21505-00-36-10-02 is part of the Bently Nevada 7200 proximity transducer system. It works with compatible proximitors and extension cables to deliver a complete vibration monitoring solution.

While specific system compatibility should be verified with Bently Nevada documentation, the probe's standard output makes it suitable for most data acquisition systems.

Frequently Asked Questions

What is the calibrated range of the 21505-00-36-10-02?

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

What is the scale factor of this probe?

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

What is the operating temperature range?

The proximitor operates from -60°F to +212°F (-51°C to +100°C), while the probe and extension cable handle -30°F to +350°F (-34°C to +177°C).

Does the probe resist corrosion?

Yes, for 8 mm probes, operation is unaffected by direct contact with air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, or DMF.

What is the total length of the 21505-00-36-10-02?

The total length option is 1.0 metre (39 inches) with a tolerance of +0.25 metre, -0.10 metre.

Product Support and Availability

The 21505-00-36-10-02 is available through Petro Auto Tech, an industrial automation parts supplier. It comes in new, original factory packing with a 12-month warranty.

Contact Petro Auto Tech for current availability and lifecycle status before ordering.