Bently Nevada 21504-000-08-10-02 5 mm and 8 mm Standard Mount Probe

Description

21504-000-08-10-02 is an 8 mm standard mount proximity probe within the Bently Nevada 7200 series transducer system. This specific configuration features a 3/8-24 UNF thread, a 0.0 inch unthreaded length (Option 000), a 0.8 inch case length (Option 08), and a 1.0 metre integral coaxial cable (Option 10) terminated with a miniature male coaxial connector (Option 02). The 7200 series proximity transducer systems provide non-contacting, gap-to-voltage measurements for both static and dynamic distances between the probe tip and the target. This system is engineered for critical machinery applications, including shaft position and vibration measurement on steam and gas turbines, compressors, pumps, centrifuges, and electric motors. The probe utilizes an eddy current principle, where the Proximitor sensor generates a radio frequency signal that passes through the probe tip to generate eddy currents in the target surface. The resulting signal is conditioned for linear display on monitoring equipment, supporting requirements such as radial vibration for bearing condition, axial thrust position, and rotor eccentricity.

Features

• 8 mm diameter tip constructed from polyphenylene sulfide (PPS), suitable for harsh and chemical environments
• 3/8-24 UNF-2A case thread for standard mounting
• Integrated 1.0 metre coaxial cable lead for system connectivity
• Miniature male coaxial connector included
• Compatible with 7200 series Proximitor sensors and 3300/9000 monitoring systems
• Linear measurement range of 80 mils (2.0 mm)
• Designed for shaft vibration and axial position measurement

Applications

• Radial vibration measurement for monitoring bearing condition, rotor imbalance, and misalignment
• Axial thrust position measurement to monitor bearing wear
• Shaft average radial position for rotor stability analysis
• Vibration amplitude and phase angle plotting for diagnostic formats (Polar and Bode)
• Eccentricity measurement for monitoring rotor bow

Ordering Information

Option	Code on This SKU	Description
Orderable Part Number	21504-000-08-10-02	8 mm Standard Mount Probe
A - Unthreaded Length	000	0.0 inches
B - Case Length	08	0.8 inches
C - Total Cable Length	10	1.0 metre
D - Connector	02	With miniature male coaxial connector

Technical Specifications

Manufacturer	Bently Nevada
Part Number	21504-000-08-10-02
Series	7200
Probe Diameter	8 mm
Case Thread	3/8-24 UNF-2A
Calibrated Range	80 mils (2.0 mm)
Scale Factor	200 mV/mil (7.87 V/mm)
Frequency Response	0 Hz to 10 kHz
Operating Temperature	-30 degC to +177 degC (-30 degF to +350 degF)
System Weight	0.59 kg (1.3 lbs)

Installation Guidelines

Ensure the probe is installed with appropriate clearance from the target surface to maintain the linear measurement range. The probe should be secured using the provided jam nut to prevent loosening due to machine vibration. Verify cable routing to avoid sharp bends or mechanical stress on the coaxial connector. Ensure the probe and extension cable (if applicable) are of matching length and part types to maintain system calibration accuracy. Grounding and shielding practices should follow standard industrial instrumentation procedures to prevent signal noise.

Compliance and Certifications

The 7200 series transducer systems are generally compatible with API 670 requirements. Consult specific hazardous location documentation if the application requires FM, CSA, or other regional certifications.