The EPRO PR6423/010-040+CON021 is a matched sensor and converter assembly designed for non-contact measurement of shaft displacement, vibration, and eccentricity in rotating machinery. Widely used in power generation, petrochemical plants, and heavy manufacturing, it offers exceptional measurement stability and durability, even under extreme temperature, pressure, and contamination conditions.
This model combines the PR6423/010-040 eddy-current proximity sensor with the CON021 signal converter, forming a complete measurement chain for critical machinery protection systems. Its design ensures reliable performance in hazardous areas, making it suitable for API 670-compliant vibration monitoring systems.
A common application example is in a steam turbine bearing pedestal, where the EPRO PR6423/010-040+CON021 continuously measures shaft position relative to the bearing sleeve. In one retrofit project, a power plant replaced older probe systems with this unit, improving diagnostic accuracy and enabling earlier detection of bearing wear — reducing unplanned outages.
| Parameter | Value |
|---|---|
| Product Model | EPRO PR6423/010-040+CON021 |
| Manufacturer | EPRO |
| Product Type | Eddy-current proximity sensor + signal converter |
| Power | -24 VDC nominal (converter input) |
| Communication / Protocol | Analog voltage output (0–20 V) |
| Operating Temperature | Sensor: -35°C to +180°C; Converter: -35°C to +65°C |
| Mounting | Threaded probe mount (sensor); DIN rail mount (converter) |
| Protection / Ingress | IP67 (sensor), IP20 (converter) |
| Dimensions (HxWxD) | Probe length: 40 mm; Converter: 115 x 25 x 120 mm |
| Weight | Probe: 0.12 kg; Converter: 0.18 kg |
| Typical Interfaces | BNC or terminal block outputs to monitoring rack |
| Compliance | API 670, CE, RoHS |
The EPRO PR6423/010-040+CON021 delivers the precision and ruggedness demanded by modern machinery protection systems:
Matched Sensor and Converter Pair – Optimized for signal accuracy, minimizing measurement drift over time.
Wide Temperature Range – Operates in environments up to +180°C at the probe tip, suitable for hot-section turbine monitoring.
Harsh-Environment Protection – Sensor IP67-rated for dust and moisture resistance; withstands oil splash and corrosive atmospheres.
API 670 Compatibility – Meets global standards for machine vibration monitoring and protection.
Stable, Noise-Resistant Output – Shielded cabling and quality connectors reduce signal interference from nearby electrical equipment.
Flexible Mounting Options – Available in various probe lengths and thread types to suit different bearing and shaft configurations.
Reduced Maintenance Downtime – Long service life and reliable calibration reduce intervention frequency.
Compared to generic proximity probe solutions, the EPRO PR6423/010-040+CON021 integrates seamlessly with established monitoring racks and condition monitoring systems, enabling faster commissioning. This makes it an asset in both greenfield installations and brownfield retrofits where system downtime must be minimized.
The EPRO PR6423/010-040+CON021 plays a vital role in industrial condition monitoring:
Power Generation – Turbines, generators, and auxiliary pumps benefit from continuous shaft vibration tracking to prevent costly failures.
Oil & Gas – Compressors and critical pumps are monitored for early detection of rotor imbalance, misalignment, or bearing wear.
Petrochemicals – Refineries use it to protect large process fans and blowers from catastrophic failure.
Steel & Mining – Detects early signs of mechanical degradation in heavy mills, crushers, and conveyors.
Marine & Offshore – Monitors propulsion and auxiliary machinery under severe vibration and temperature conditions.
For instance, in a natural gas compressor station, replacing older probes with the EPRO PR6423/010-040+CON021 improved data quality, allowing operators to set more accurate alarm thresholds and avoid unnecessary shutdowns.
EPRO PR6423/010-030+CON021 – Shorter probe length for confined installations.
EPRO PR6423/010-050+CON021 – Longer probe version for deep bearing housings.
EPRO PR6422/010-040+CON021 – High-temperature variant for extreme environments.
EPRO PR6424/010-130+CON021 – Different tip diameter for special applications.
EPRO PR6426/010-040+CON021 – Enhanced environmental sealing.
EPRO CON041 – Advanced converter with digital communication options.
EPRO MMS6120 – Machinery monitoring module compatible with PR6423 sensors.
Installing the EPRO PR6423/010-040+CON021 requires ensuring the probe tip is precisely aligned with the shaft surface at the correct gap (typically 1.0 mm for calibration). The converter should be mounted in a clean, ventilated control enclosure, with cable routing away from high-voltage lines to minimize interference.
Routine maintenance includes periodic verification of probe gap and output signal calibration, especially after mechanical work on the monitored machinery. Cleaning the probe tip to remove oil or debris buildup will help maintain measurement accuracy. The converter’s terminals should be inspected for tightness during scheduled shutdowns. In critical applications, it’s advisable to keep a pre-calibrated spare set ready for rapid swap-out, minimizing downtime.
The EPRO PR6423/010-040+CON021 is backed by a one-year warranty and free replacement service from Xiamen Xiongba E-commerce Co., Ltd. Branch, independent from the OEM. Every unit is subjected to pre-shipment functional testing, datasheet verification, and serial-number traceability. Warranty claims are handled promptly through Xiongba’s dedicated service team to minimize disruption to plant operations.
