Description
Emerson / EPRO PR6423/010-140 + CON021 Eddy Current Sensor Kit
Continuing the industrial automation hardware sequence, PR6423/010-140+CON021 specifies an eddy current displacement/vibration measuring chain manufactured by EPRO (now part of Emerson / Metrix), widely used for machinery protection in heavy industries.
Key Specifications & Overview
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Manufacturer: Emerson / EPRO
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Product Type: Eddy Current Proximity Sensor Assembly / Measurement Chain
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Sensor Probe Part Number: PR6423/010-140
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Signal Converter / Transmitter Part Number: CON021
Component Breakdown
1. PR6423/010-140 Eddy Current Probe
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Probe Thread / Type: Standard industrial configuration (often M10 or specialized thread pitch depending on housing variant)
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Linear Range: Typically 0 to 2 mm or 0 to 3 mm linear measuring range for vibration and shaft displacement monitoring.
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Armored Cable: Features an integrated high-temperature coaxial cable with protective stainless-steel armor, designed to withstand harsh oil and gas or power generation environments.
2. CON021 Signal Converter
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Function: Converts the raw high-frequency signals generated by the PR6423 probe into a proportional standard industrial output (such as -4 to -20 mA or 0 to 10 V, depending on system configuration).
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Power Supply / Integration: Acts as the interface bridge to machinery protection monitors (such as EPRO MMS systems) or distributed control systems (DCS).
Common Applications
Deployed extensively on critical rotating machinery to measure radial/axial shaft vibration and position, including:
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Steam and Gas Turbines
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Centrifugal and Axial Compressors
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Large Industrial Pumps and Generators
PR6423010-140+CON021
Product Overview
PR6423/010-140 is an 8mm eddy current probe sensor, and CON021 is the matched signal conditioner manufactured by EPRO (Emerson). The complete set adopts non-contact eddy current measuring principle. It detects shaft radial vibration, axial displacement, eccentricity and rotational speed of rotating machinery, converts clearance variation into standard voltage output signals for machine monitoring systems such as MMS6000.
This assembly is widely used for steam turbines, gas turbines, compressors and generators in power, petrochemical and oil & gas industries.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | PR6423/010-140 (Probe) + CON021 (Signal Conditioner) |
| Module Type | Eddy Current Displacement Measuring Assembly |
| Manufacturer | EPRO, Emerson |
| Probe Diameter | 8 mm |
| Nominal Sensitivity | 8 V/mm |
| Linear Measuring Range | 0 ~ 1 mm |
| Recommended Initial Air Gap | 0.5 mm |
| Minimum Target Shaft Diameter | 25 mm |
| Target Material | Standard: 42CrMo4 / AISI 4140 ferromagnetic steel |
| Output Signal | 0 ~ -22 VDC voltage feedback |
| Power Supply for CON021 | -24 VDC control power |
| Probe Operating Temperature | -35 ℃ ~ +180 ℃ (short term up to +200 ℃) |
| Conditioner Operating Temperature | -20 ℃ ~ +70 ℃ |
| Protection Class | Probe IP66; CON021 IP20 (cabinet mounting) |
| Linearity Error | ≤ ±0.25% FS |
| Leak Rate (cable assembly) | <1×10⁻⁹ mbar·l/s |
| Commissioning Tool | EPRO MMS configuration software |
| Spare Part Status | OEM production discontinued; surplus new and refurbished assemblies available |
Key Features
- Non-contact measurement, no mechanical wear on rotating shafts
- Probe and conditioner must be used as matched set; part number suffix variant cannot be mixed arbitrarily
- Built-in circuit monitoring inside CON021 to detect cable break and probe failure
- Excellent anti-interference performance, stable operation under strong electromagnetic field in turbine cabinets
- Supports continuous online vibration monitoring for turbomachinery protection and predictive maintenance
- Optimized temperature compensation algorithm to reduce measurement drift under temperature fluctuation
- Output signal compatible with most machine monitoring and DCS analog input modules
