Bently Nevada 21504-16-28-10-02 5 mm and 8 mm Standard Mount Probe

Description

21504-16-28-10-02 is an 8 mm standard mount proximity probe from the Bently Nevada 7200 Series, configured with 1.6 in unthreaded length (Option 16), 2.8 in case length (Option 28), 1.0 m total cable length (Option 10), and a miniature male coaxial connector (Option 02). As a core element of the 7200 Series transducer system, this probe operates on the eddy-current principle to measure both static and dynamic displacement between the probe tip and the target surface, such as a machine shaft.

This transducer configuration is designed for compatibility with 7200 Series Proximitors and extension cables, maintaining a system linear range of 80 mils (2 mm) with a scale factor of 200 mV/mil (8 V/mm). The 8 mm probe body is constructed from polyphenylene sulfide (PPS), suitable for diverse industrial environments including those with exposure to oil or water. This unit is used extensively in rotating machinery monitoring, including radial vibration and axial thrust position measurements on turbines, compressors, and pumps.

Features

• 8 mm probe diameter compatible with 7200 Series transducer systems
• 1.6 in unthreaded length and 2.8 in case length configuration
• 1.0 m integral coaxial cable length
• Miniature male coaxial connector (Option 02)
• Constructed of high-performance polyphenylene sulfide (PPS)
• Linear measuring range of 80 mils (2 mm)
• Compatible with Bently Nevada 3300 and 9000 Monitoring Systems

Applications

• Radial vibration monitoring for bearing condition and rotor alignment
• Axial thrust position measurement to detect bearing wear
• Shaft average radial position for attitude angle and rotor stability analysis
• Vibration amplitude and phase angle plotting for diagnostic diagnostics (Polar and Bode formats)
• Rotor bow detection via eccentricity measurements

Ordering Information

Technical Specifications

Installation Guidelines

Ensure the probe is mounted securely to prevent vibration or loosening during operation. Use the provided jam nuts for positioning. When routing the coaxial cable, avoid sharp bends and maintain separation from high-voltage cables to prevent signal interference. Ensure the probe tip is clear of obstructions within the linear range. For hazardous area installations, adhere to the specific agency approval documentation provided with the system.

Compliance and Certifications

The 7200 Series proximity transducer systems are designed for compliance with API 670 requirements. Consult the local regulatory markings on the device and relevant Bently Nevada hazardous location datasheets for specific CSA, FM, and ATEX/IECEx certifications applicable to the installed location.