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The 21504-000-020-05-02 is part of the 21500 series eddy current transducer system. It is an 8 mm standard mount probe with a 3/8-24 threaded configuration, designed for use with extension cables and Proximitor sensors to form a complete proximity measurement system for industrial machinery monitoring.
High Accuracy Measurement
Interchangeable System Components
Eddy Current Sensing Technology
The probe operates using eddy current technology to detect the distance between the probe tip and the target surface, providing a signal proportional to the gap. The system offers high accuracy, stable output, and supports interchangeable probes, extension cables, and Proximitor sensors without the need for individual calibration.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 21504-000-020-05-02 3300 XL 8 mm Standard Mount Proximity Probe Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Power Generation
Used to monitor shaft vibration and displacement in generator sets, steam turbines, and gas turbines, providing continuous mechanical condition monitoring during power generation to ensure the safe operation of large rotating equipment.
Oil & Gas
Used for non-contact measurement of fluid diaphragm bearings in compressors and pumps during oil and gas extraction and transportation, preventing production interruptions and environmental risks caused by mechanical failures.
Petrochemical Processing
Widely used for monitoring centrifuges and reactors in chemical plants, meeting industrial safety standards, and accurately measuring rotor radial and axial displacement in harsh chemical process environments.
Hydroelectric Power
Used to monitor the runout and vibration of the main shaft and the condition of the turbine guide bearings in hydroelectric generator sets, utilizing its excellent temperature drift stability to maintain accurate signals in hydroelectric environments.
Water & Wastewater
Used for monitoring motors and pump sets in large water supply and drainage pumping stations, enabling preventative maintenance and reducing the rate of sudden failures in urban infrastructure by monitoring the operating trajectory of mechanical components in real time.
General Industrial Machinery
Suitable for general machinery such as blowers and industrial turbines, and often used as a keyphasor for speed measurement to meet the protection needs of rotating machinery in various industrial automation sites.
The probe is constructed of a polyphenylene sulfide (PPS) tip and a stainless steel case. These materials provide excellent resistance to the high-temperature and high-pressure environments, as well as the corrosive fluids found in the steam and gas turbines and other industrial machinery.
Each 3300 XL component is backward-compatible and interchangeable with other non-XL 3300 series 5 mm and 8 mm transducer system components. This compatibility includes the 3300 5 mm probe, allowing for a complete interchangeability of components without the need to match or bench calibrate individual probes, extension cables, or Proximitor sensors.
What is the main function of the 21504‑000‑020‑05‑02 probe?
This part is a reverse mount 8 mm proximity probe designed for use with the 3300 XL Proximity Transducer System, which provides an output voltage directly proportional to the distance between the probe tip and the target surface.
How does the 21504‑000‑020‑05‑02 probe work with the 3300 XL system?
The probe is one component of the 3300 XL system, which consists of the probe, extension cable, and Proximitor sensor. When combined, the system can accurately measure vibration and position on fluid‑film bearing machines.
What measurements can 21504‑000‑020‑05‑02 support?
The 3300 XL 8 mm proximity system, including this probe, is used for radial vibration and radial position measurement, axial (thrust) position measurements, and tachometer/Keyphasor reference signals when installed on machinery.
What is the signal output principle of the 21504‑000‑020‑05‑02 probe?
The system provides an output voltage that is directly proportional to the distance between the probe tip and the conductive surface being observed. This voltage output reflects changes in position and vibration.
What type of machines is the 21504‑000‑020‑05‑02 probe used on?
When used as part of the 3300 XL system, the probe is installed on fluid‑film bearing machines where vibration and position monitoring is required, typically in industrial machinery contexts.
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