21504-00-52-05-02 | Bently Nevada 8 mm Probe Proximity Vibration

What Is the Bently Nevada 21504-00-52-05-02?

When machinery vibration threatens uptime, the 21504-00-52-05-02 from Bently Nevada provides precise proximity measurements. This 8 mm probe is part of the 7200 Proximity Transducer Systems family. It offers a calibrated range of 80 mils (2.0 mm) starting at approximately 10 mils (0.25 mm) from the probe face. Maintenance engineers rely on its consistent performance for critical rotating equipment.

Key Features and Technical Specs

• Scale factor: 200 mV/mil (7.87 V/mm) with ±4% accuracy as a system.
• Frequency response: 0 to 10 kHz (0 to 600,000 cpm) with -5% at 10 kHz.
• Operating temperature for probe and extension cable: -30°F to +350°F (-34°C to +177°C).
• Power input: -17.5 Vdc to -26 Vdc at 12 mA maximum consumption.
• System weight: 1.3 lbs (0.59 kg).
• Corrosion resistance for 8 mm probes: unaffected by air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, or DMF.

A standout spec is the linearity: within 0.8 mils (0.02 mm) of a 200 mV/mil straight line when calibrated as a system. This ensures reliable vibration data for predictive maintenance.

Real-World Applications

In rotating machinery like turbines and compressors, the 21504-00-52-05-02 monitors shaft vibration and position. Its wide temperature range suits harsh environments. For example, in a refinery, the probe's corrosion resistance allows direct contact with process fluids. This reduces false trips and extends service life.

Installation and Setup

Mount the probe with its 3/8-24 thread into a standard mounting hole. Ensure the unthreaded length is 0 mm and overall case length is 5.2 inches. The total length of 0.5 meter (20 inches) includes a miniature male coaxial connector. Calibrate the system for best accuracy. Follow Bently Nevada's guidelines for gap setting and cable routing.

Maintenance and Reliability

Periodically inspect the probe face for debris or damage. The rugged construction withstands 95% noncondensing relative humidity. Because the probe operates without contact, there is no mechanical wear. This design minimizes maintenance intervals and lowers total cost of ownership.

Compatibility and Integration

The 21504-00-52-05-02 integrates with Bently Nevada 7200 series monitors and other compatible vibration monitoring systems. Its 200 mV/mil output interfaces directly with most data acquisition modules. For specific compatibility, consult the official documentation or contact Petro Auto Tech.

Common Questions About the 21504-00-52-05-02

Q: What is the calibrated range of this probe?

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 tolerance?

A: As a system, the scale factor is 200 mV/mil (7.87 V/mm) with ±4% accuracy.

Q: Can the probe operate in high humidity?

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

Q: What power supply does it require?

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

Q: Is the probe resistant to chemicals?

A: For 8 mm probes, operation is not affected by direct contact with air, water, lube oil, ammonium hydroxide, sulfuric acid (10%), MEK, or DMF.

Product Support and Availability

The 21504-00-52-05-02 is available as new and original in factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Please verify current lifecycle status and availability before ordering.