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The Bently Nevada 21504-00-32-10-02 is a high-precision, non-contacting 7200 Series 8mm Eddy Current Proximity Probe. Engineered for heavy-duty industrial environments, this sensor is a critical component in machinery protection and condition monitoring systems. By generating a high-frequency electromagnetic field, it measures the static and dynamic distance between the probe tip and a conductive target (typically a machine shaft). It is globally recognized for its exceptional reliability in measuring radial vibration, axial position (thrust), shaft speed, and phase reference (Keyphasor) on critical rotating machinery.

Frequently Asked Questions

What thread size does this specific probe use?

It uses a standard 3/8-24 English thread configuration.

What does the "21504" base number mean?

The "21504" designates a standard-mount 8mm probe within the legacy 7200 series ecosystem.

What is the linear range of this 8mm probe?

The linear measurement range is 80 mils (approximately 2.0 mm or 2000 microns).

What is the scale factor for this probe system?

The standard scale factor is 200 mV/mil (7.87 V/mm).

Product Applications

Power plants: Monitoring shaft displacement and vibration in steam turbines and gas turbines.

Oil and gas: Used in large compressors and centrifugal pumps in gas pipelines and refineries.

Steel mills and mines: Installed on heavy-duty rolling mills and industrial motors and generators to prevent sudden mechanical failures.

Features:

Frequency Response: 0 Hz (DC) to 10 kHz

Noncontacting

Gap-to-Voltage Transducer Systems

Measures Static and Dynamic Distances

The GE 7200 5mm / 8mm Series Proximity Transducer Systems are noncontacting, gap-to-voltage transducer systems that measure static as well as dynamic distances between the probe tip and the observed target. The general application in any requirement for an accurate, noncontacting displacement measurement. However, the most common use is for shaft position and vibration measurements on rotating and reciprocation machinery. They are designed for use with virtually any machine type including gas and steam turbines, compressors, pumps, centrifuges, electric motors and generators. The system offer 80 mils (2mm) of linear measuring range and are compatible with API 670 requirements.