Product Core Brief
- Model: PR6423/010-140 + CON021
- Brand: EMERSON / EPRO (EPRO GmbH, acquired by Emerson in 2009)
- Series: PR6423 Non-Contact Eddy Current Sensor + CON021 Converter
- Core Function: Non-contact shaft vibration, axial/radial displacement, eccentricity, and position measurement for critical rotating machinery.
- Product Type: Eddy Current Probe + Converter Kit
- Key Specs: 8mm probe | ±1.0 mm static range | 8 V/mm sensitivity | 10 m armored cable | LEMO plug | CON021 IP20 converter | API 670 compliant
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction (Rotation Engine)
The EMERSON EPRO PR6423/010-140 + CON021 is a complete eddy current sensor and converter kit designed for critical turbomachinery protection applications, including steam turbines, gas turbines, compressors, blowers, and fans. The kit combines a PR6423/010-140 8mm eddy current probe with an EPRO CON021 converter, forming a factory-calibrated measurement loop for shaft vibration, axial and radial displacement, eccentricity, and position monitoring.
The PR6423/010-140 probe uses the standard PR6423 suffix convention: the first group defines thread length and cable armor, while -140 indicates a 10 m total system cable length with armored construction. The “010” prefix identifies the specific thread length and armor configuration, which should be confirmed against the label before ordering. The probe outputs a voltage signal proportional to the gap between the probe tip and the conductive target surface, with no physical contact and no mechanical wear.
The CON021 converter is an IP20 panel-mount converter designed for sensors with LEMO plug connections. It accepts PR6422 through PR6426 sensors and provides a DC voltage output with a superimposed AC vibration signal, suitable for connection to machinery protection monitors, PLC analog inputs, or DCS vibration cards. Unlike the CON031 converter, which uses screw terminals for bare-end sensors, the CON021 uses a self-locking LEMO plug for the sensor connection and screw terminals for power/signal wiring.
For procurement and maintenance teams, factory-sealed surplus kits reduce risk from prior field installation, cable insulation degradation, connector oxidation, or unknown calibration history.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | EMERSON / EPRO (EPRO GmbH) |
| Probe Model | PR6423/010-140 |
| Converter Model | |
| Probe Diameter | 8 mm |
| Measurement Range (Static) | ±1.0 mm (±0.04 in) |
| Measurement Range (Dynamic) | 0 to 500 µm (0 to 20 mil); best suited for 50–500 µm |
| Sensitivity | 8 V/mm (203.2 mV/mil) |
| System Cable Length | 10 m total (indicated by -140) |
| Cable Type | Armored (stainless steel armor protection) |
| Sensor Connection | Self-locking LEMO plug |
| Probe Operating Temperature | -35 to +180°C (-31 to 356°F); short-term up to +200°C |
| Converter Operating Temperature | -30 to +100°C (-22 to 212°F) |
| Converter Protection Rating | IP20 |
| Converter Connection | LEMO plug (sensor) + screw terminals (power/signal) |
| Power Supply | -23 to -32 VDC typical |
| Output | DC voltage with superimposed AC vibration signal |
| Standards | API 670, DIN 45670, ISO 10817-1 |
Note: The exact thread length for PR6423/010-140 must be verified from the nameplate, as the “010” prefix maps to a specific thread/armored configuration within the PR6423 ordering system.
Key Selling Points & Differentiators
- Complete probe + converter kit eliminates compatibility risk between sensor and converter.
- Genuine EPRO 8mm eddy current probe for API 670 machinery protection systems.
- Armored cable construction provides superior mechanical protection in harsh industrial environments.
- 10 m system cable length suits applications where the monitor rack is further from the machine train.
- CON021 LEMO-plug converter enables quick, reliable sensor connections with panel-mount installation.
- Factory-calibrated against 42CrMo4 steel; no field recalibration required for standard applications.
- Factory-sealed surplus stock reduces risk from prior field installation or cable degradation.
- Not recommended as a substitute for PR6424/PR6425/PR6426 probes without verifying range and converter compatibility.
Quality Transparency SOP (DYNAMIC GENERATION)
For surplus EPRO probe + converter kits, inspection focuses on physical integrity, cable condition, and correct model identification:
- Visual QA: Inspect probe tip, threaded body, armored cable jacket, converter housing, and labels for impact damage, cracking, or corrosion.
- Anti-static handling: Seal in ESD-safe packaging with humidity indicators before shipment.
- Nameplate verification: Confirm probe model PR6423/010-140 and converter model CON021 match the order.
- Cable & connector inspection: Check armored cable integrity, LEMO plug pins, and screw terminals for wear, oxidation, or bent contacts.
- Fit verification: Where possible, confirm mechanical compatibility with the intended mounting bracket, target shaft diameter (>25 mm), and monitor input requirements.
Technical Risk Avoidance (DYNAMIC GENERATION)
❗ Confirm the /010-140 suffix. The 010 prefix defines the specific thread length and armor configuration, while -140 indicates a 10 m armored cable. Verify against the label before installation.
❗ Match LEMO-plug sensor with CON021. The CON021 converter is designed for LEMO-plug sensors. It is not compatible with bare-end sensors intended for CON031 converters.
❗ Verify cable length. The -140 suffix indicates a 10 m total system length. Ensure this matches the distance between the probe mounting point and the converter location.
❗ Match the correct converter. PR6423 probes must be paired with compatible CON-series converters. Mixing converters designed for different probe series or connection types causes sensitivity errors and measurement distortion.
❗ Verify target material. Factory calibration is based on 42CrMo4 steel. Using the probe on non-standard materials requires field gap adjustment.
❗ Check minimum shaft diameter. For target surfaces smaller than 25 mm, measurement error may exceed 1%.
❗ Validate hazardous area compliance. CON021 is IP20 and not inherently suitable for hazardous areas. Intrinsic safety barriers are required for explosive atmospheres, and CON…/91 series converters should be used instead.
Buyer’s FAQ
Is this a genuine EPRO sensor kit?
Yes. The PR6423/010-140 + CON021 is an original EPRO eddy current probe and converter kit. EPRO GmbH was acquired by Emerson in 2009 and is now part of Emerson’s asset optimization portfolio.
What condition is the kit in?
Units are sold as New Original / New Surplus unless otherwise stated. That means unused, factory-sealed inventory rather than field-removed hardware.
Can I use it as a direct replacement?
If your existing installation uses a PR6423/010-140 probe with a CON021 converter and the cable length, thread configuration, and monitor input match, it should be a like-for-like replacement. Always confirm the nameplate first.
What is the difference between CON021 and CON031?
The uses a LEMO plug for sensor connection, while the CON031 uses screw terminals for bare-end sensors. They are not directly interchangeable without verifying the sensor cable end type.
What does -140 mean?
The -140 suffix indicates a 10 m total system cable length with armored construction.
Is this the same as PR6424 or PR6425?
No. PR6423, PR6424, and PR6425 have different measurement ranges and sensitivities. They are not interchangeable without verifying system calibration.
How fast can you ship?
Stock availability determines lead time. For urgent machinery protection maintenance, request expedited shipping at checkout.
Do you offer a warranty?
Yes. Warranty terms are provided at checkout. For surplus sensor hardware, a clear warranty window helps protect against DOA or hidden inventory damage.
