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The PR6423/018-140 CON021 is an industrial-grade non-contact eddy current measurement system manufactured by Emerson. This system is specifically designed for monitoring the mechanical health of large, high-speed rotating machinery to prevent catastrophic damage caused by severe vibration or displacement.
API 670 Compliance
2.0 mm wide linear measuring range with a standard 8 V/mm sensitivity
Extreme temperatures from -35°C to +180°C with an IP67 rating
The superior operational capability of the system is driven by the matching CON021 Eddy Current Signal Converter, which boasts an impressive frequency response range from 0 to 20,000 Hz and a swift signal rise time of less than 15 µs. This allows the converter to translate high-frequency impedance variations into standard negative voltage outputs with zero attenuation, ensuring seamless integration with AMS 6500, MMS6000, and major DCS platforms. Built to conquer hostile field environments, the PR6423 sensor incorporates a chemical-resistant PEEK tip that operates effortlessly across extreme temperatures from -35°C to +180°C, backed by an IP67 enclosure rating and Intrinsic Safety (Ex ia) certification. This rugged design guarantees absolute immunity against oil, moisture, and electromagnetic interference, making it the premier choice for safety interlock systems across hazardous oil, gas, and chemical processing facilities.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
EPRO PR6423/018-140 CON021 Eddy Current Signal Converter 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.
Oil Extraction
Used for monitoring bearing vibration and axial displacement of mud pumps and top-drive heavy motors on offshore crude oil drilling platforms and onshore oilfields to prevent mechanical seizure.
Petroleum Refining
Applied to large centrifugal rich-gas compressors and flue gas turbines in Fluid Catalytic Cracking Units (FCCU) and hydroprocessing units to measure dynamic rotor shaft vibration, avoiding machinery damage from excessive vibrations.
Nuclear Power
Applied to the Reactor Coolant Pumps (RCP) in the nuclear island and turbogenerator units in the conventional island to reliably collect main shaft vibration and rotational speed signals.
Thermal Power
Installed inside the bearing pedestals of 300MW-1000MW steam turbines to accurately measure relative shaft vibration within the bearing clearance and axial displacement caused by thermal expansion.
Iron, Steel & Metallurgy
Collects real-time dynamic radial displacement and speed data from the main shaft of high-speed axial blast blowers (AV blowers), the core power equipment for steel plant blast furnaces, to prevent surge damage.
When operating the PR6423/018-140 CON021 system, it is vital to adjust the sensor's initial mounting air gap by measuring the output voltage of the CON021 converter, ensuring it is locked precisely at the optimum linear center point (typically around -12 VDC). Because eddy current systems are factory-calibrated based on their exact total electrical length, the integral cables must never be cut, spliced, or sharply bent. All extension wiring must be routed through flexible metallic conduits to eliminate mechanical wear and field electromagnetic interference. Furthermore, the converter must be housed in a temperature-controlled, dust-proof enclosure with strict intrinsically safe grounding implemented when connecting to DCS or AMS platforms.
It is a non-contact eddy current measurement system manufactured by Emerson (formerly epro), consisting of the PR6423 eddy current sensor (8mm tip) and the CON021 signal converter (driver).
What is the main industrial application of PR6423/018-140 CON021?
It is primarily used for real-time monitoring of shaft vibration, axial displacement, eccentricity, and rotational speed in critical turbomachinery like steam turbines, compressors, blowers, and gearboxes.
How does the PR6423/018-140 CON021 work?
The PR6423 probe senses the gap changes on the metal shaft surface via a high-frequency electromagnetic field to cause impedance variations, which the CON021 converter then translates into a negative voltage signal proportional to the gap.
How to correctly install the PR6423/018-140 CON021 probe?
The probe must be mounted perpendicularly to the shaft surface using a threaded bracket. Adjust the initial air gap using a voltmeter to measure the CON021 output until it reaches the linear center point (typically around -12 VDC) before locking it.
Does PR6423/018-140 CON021 comply with the API 670 standard?
Yes, the design and performance specs of this system fully comply with the stringent API 670 standard of the American Petroleum Institute for turbomachinery protection.
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