Product Overview

The Bently Nevada 21504-000-016-05-02 is a high-precision 8mm reverse mount proximity probe belonging to the industry-standard 3300 XL series. This transducer is specifically engineered for non-contact displacement measurements in critical rotating machinery. By utilizing eddy current technology, the probe monitors the distance between the sensor tip and a conductive target, providing essential data for vibration analysis and axial position monitoring.

Designed for internal mounting applications or use within specialized housing assemblies, the reverse mount configuration is ideal for installations where space constraints prevent the use of standard forward-mount probes. This model is fully compliant with API 670 standards, making it a trusted component for Turbine Supervisory Instrumentation (TSI) in the global power and oil and gas sectors.

Key Technical Characteristics

The 21504-000-016-05-02 is built to offer maximum reliability and interchangeability within the 3300 XL ecosystem, ensuring consistent performance across diverse industrial environments.

• Extended Linear Range: Provides a 2.0 mm (80 mil) linear measurement range, allowing for the detection of both rapid dynamic vibrations and slow static shaft shifts.

• Precision Output: Delivers a highly accurate gap-to-voltage signal when powered by a -17.5 to -26 Vdc supply, ensuring high-fidelity data for protection systems.

• Ruggedized Interface: Features a miniature male coaxial ClickLoc connector with gold plating to maintain low-resistance contact and resist corrosion in high-humidity areas.

• Thermal Stability: Rated for operation and storage in extreme temperatures ranging from -51°C to +177°C, maintaining signal calibration despite thermal cycling.

• System Versatility: The probe is designed for complete electrical interchangeability with other 3300 XL components, simplifying maintenance procedures and reducing spare parts inventory.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 21504-000-016-05-02

• Probe Type: 8mm Reverse Mount Proximity Transducer

• Thread Size: 3/8-24 UNF-2A

• Case Length: 0.8 Inches

• Total Cable Length: 1.0 Meter (Unarmored)

• Connector Type: Miniature Male Coaxial

• Measurement Range: 80 mils (2mm)

• Compliance: API 670 Standard for Machinery Protection

• Net Weight: 0.06 kg

• Dimentions: 1.8x1.6x12.3cm

Primary Industrial Applications

The 21504-000-016-05-02 is a fundamental sensor for the protection of high-capital rotating assets, typically installed on:

• Centrifugal and axial compressors

• Steam, gas, and hydro turbines

• High-pressure boiler feed pumps

• Industrial gearboxes and large motor bearings