Description

The 21504-000-016-10-02 is an 8 mm standard mount proximity probe belonging to the Bently Nevada 7200 series transducer system. This specific configuration features a 0.0 inch unthreaded length (Option 000), a 1.6 inch case length (Option 016), a 1.0 meter total cable length (Option 10), and includes a miniature male coaxial connector (Option 02). Designed for non-contacting vibration and position measurement, this probe operates on the eddy current principle to detect static and dynamic distances between the probe tip and a conductive target. The 8 mm probe is constructed from polyphenylene sulfide (PPS), a high-performance plastic engineered to maintain stability in harsh, wet, or chemically active industrial environments. This transducer is primarily used in critical machinery monitoring applications, such as shaft radial vibration, axial position, and eccentricity monitoring on turbines, compressors, and pumps. It is compatible with 7200 series Proximitors and monitoring systems.

Features

• 8 mm probe tip diameter constructed from chemically resistant polyphenylene sulfide (PPS)
• 1.0 meter integral coaxial cable length
• Miniature male coaxial connector for signal transmission
• 0.0 inch unthreaded length with 1.6 inch case length
• Standard mount configuration with 1/4-28 thread
• Linear measurement range of 80 mils (2.0 mm)
• Frequency response from 0 Hz (DC) to 10 kHz
• Compatible with 7200 series Proximitors for calibrated system output

Applications

• Radial vibration measurement for bearing condition and rotor imbalance detection
• Axial thrust position monitoring to determine bearing wear
• Shaft average radial position for rotor stability analysis
• Eccentricity measurement to monitor rotor bow
• Critical machinery protection including gas and steam turbines, compressors, and centrifuges

Ordering Information

Orderable Part Number	21504-000-016-10-02	8 mm Standard Mount Probe
A - Unthreaded Length	000	0.0 inches
B - Case Length	016	1.6 inches
C - Total Cable Length	10	1.0 metre
D - Connector	02	With miniature male coaxial connector

Technical Specifications

Manufacturer	Bently Nevada
Model	21504 (7200 Series)
Probe Diameter	8 mm
Case Thread	1/4-28
Connector Type	Miniature male coaxial
System Linear Range	80 mils (2.0 mm)
Scale Factor	200 mV/mil (7.87 V/mm)
Frequency Response	0 to 10 kHz
Operating Temperature (Probe)	-30 degF to +350 degF (-34 degC to +177 degC)
Housing Material	Polyphenylene sulfide (PPS)

Installation Guidelines

• Ensure the probe is mounted securely to minimize mechanical resonance.
• Maintain the specified gap-to-voltage requirements during installation to ensure linear measurement.
• Route coaxial cables away from high-voltage lines or sources of electromagnetic interference.
• Use appropriate mounting hardware to maintain the probe's orientation and depth.
• Verify probe tip clearance from the target to prevent physical damage during machine operation.