EPRO PR6423/000-000+CON011 Eddy Current Sensor

1. Product Overview:Trusted Non-Contact Measurement for Industrial Machinery

The EPRO PR6423/000-000 Eddy Current Sensor is a high-performance non-contact displacement sensor designed for machinery protection and condition monitoring in industrial environments. Based on the eddy-current principle, it accurately measures relative displacement, vibration, and axial position of metallic targets (e.g., rotating shafts) – making it ideal for critical assets like turbines, generators, compressors, and pumps in power generation, oil & gas, and heavy manufacturing sectors.

Engineered for durability and reliability, this sensor features a robust construction, wide temperature tolerance, and compatibility with EPRO’s signal conditioners (e.g., CON021, CON031) to form a coplete measurement chain. It delivers stable, drift-free data even in harsh conditions (high vibration, extreme temperatures, electromagnetic interference), supporting proactive maintenance and preventing unplanned machinery downtime.

2. Key Features & Benefits: Industrial-Grade Performance

2.1 High-Precision Non-Contact Measurement

• Eddy-Current Technology: Enables contactless monitoring of metallic targets (ferromagnetic and non-ferromagnetic materials), eliminating wear and tear from physical contact with moving parts.

• Broad Measurement Range: Typically supports 2 mm or 4 mm linear displacement ranges (depending on paired conditioner), with high sensitivity (e.g., 8 mV/µm for voltage output, 2.5 µA/µm for current output) to capture 微小振动 (micro-vibrations) and subtle position changes.

• Excellent Frequency Response: DC to 10 kHz (-3 dB) bandwidth, ensuring accurate detection of both static position (e.g., shaft axial gap) and dynamic vibration (e.g., rotor imbalance, bearing defects).

2.2 Robust Construction & Environmental Durability

• Heavy-Duty Housing: Stainless steel (AISI 316L) body with high-temperature resistant sensor tip (e.g., Torlon® polyamide-imide), resistant to corrosion, chemical exposure, and mechanical impact.

• Wide Temperature Tolerance: Operates in -40°C to +180°C (short-term survival up to +220°C), suitable for high-temperature industrial environments (e.g., turbine casings, engine compartments).

• EMI/EMC Protection: Integrated electromagnetic interference (EMI) filtering, complying with industrial standards (EN 61000-6-2, EN 61000-6-4) to maintain signal integrity near motors, frequency converters, or high-voltage equipment.

2.3 Seamless Integration & Flexibility

• Modular Compatibility: Paired exclusively with EPRO signal conditioners (e.g., CON021, CON031) to form a calibrated measurement system; supports extension cables (e.g., CA6400 series) for long-distance installations (up to 10 m).

• Versatile Mounting: Right-angle (90°) or straight mount options (depending on variant), with metric/imperial thread options (e.g., M10 × 1, 3/8″-24UNF) to fit diverse machinery configurations.

• Interchangeable Components: Sensor, conditioner, and cable components are interchangeable within the EPRO measurement chain, simplifying maintenance and replacement.

3. Technical Specifications:Engineered for Accuracy

3.1 Measurement & Electrical Specifications

3.2 Environmental & Mechanical Tolerance

3.3 Physical & Connector Details

• Housing Material: Stainless steel (AISI 316L) body; Torlon® sensor tip

• Cable Configuration: Integral FEP-covered coaxial cable (70 Ω impedance, Ø3.6 mm), with lengths available (0.5 m, 1 m, 5 m, 10 m) or compatible with extension cables (CA6400 series)

• Connectors: Self-locking miniature coaxial connector (male), hand-tightened for secure, vibration-resistant connections

• Dimensions: 6U height (262 mm) × 20 mm width (0.8 in) × 125 mm depth (4.9 in) (typical); weight ~0.25 kg (0.55 lb)

4. System Compatibility & Calibration

4.1 Compatible Components

• Signal Conditioners: EPRO CON021 (2-wire current output), CON031 (3-wire voltage output) – required for signal conversion and calibration.

• Extension Cables: EPRO CA6400 series (FEP-covered coaxial cables) – extend sensor reach up to 10 m for hard-to-access installations.

• Monitoring Systems: Integrates with EPRO MMS6000 machinery protection system or third-party DCS/PLC systems (via conditioned voltage/current outputs).

4.2 Calibration Requirements

• Calibration Temperature: +23°C ±5°C (factory-calibrated for standard steel targets: VCL 140, AISI 4140).

• Custom Calibration: Available for non-standard target materials (provide alloy sample or precise specifications to EPRO for tailored calibration).

• Interchangeability: Calibrated to EPRO’s strict standards, ensuring sensor-conditioner interchangeability without re-calibration.

5. Installation & Safety Guidelines

5.1 Installation Steps

1. Mounting: Secure the sensor via threaded body (M10 × 1 or 3/8″-24UNF) to the machinery frame, ensuring alignment with the target (shaft) – maintain perpendicularity (±1°) for optimal accuracy.

2. Cable Routing: Use integral or extension cables (CA6400 series) to connect to the signal conditioner; route cables away from high-voltage lines to minimize EMI.

3. Gap Setting: Set initial gap between sensor tip and target to the midpoint of the measurement range (e.g., 1.15 mm for 2 mm range) using EPRO’s calibration tools.

5.2 Safety Notes

• Hazardous Areas: For explosive environments, select Ex-certified variants (e.g., PR6423/000-000 Ex ia) and install per ATEX/IECEx/CSA standards (e.g., Zone 0/1/2, Class I Div 1/2).

• Cable Protection: Use flexible stainless steel hose (with FEP sheath) for mechanical protection in high-vibration areas; avoid cable kinking (minimum bend radius: 20 mm for FEP cables).

• Static Discharge: Ground the sensor body and conditioner to prevent electrostatic discharge (ESD) damage to sensitive electronics.

6. Applications: Where Precision Matters

The PR6423/000-000 is critical for machinery monitoring in:

• Power Generation: Steam/gas turbines (shaft vibration, axial thrust), generators (rotor imbalance), pumps (bearing condition).

• Oil & Gas: Turbocompressors (impeller vibration), pipelines (pump shaft position), offshore drilling equipment (gearbox monitoring).

• Heavy Manufacturing: Motors (rotor eccentricity), rolling mills (roll position), paper machines (roller vibration).

7.Ordering Information: Customize for Your Needs

7.1 Related Products

• Signal Conditioners: EPRO CON021 (204-040-000-001), CON031 (204-040-000-002).

• Extension Cables: EPRO CA6400 (913-402-000-013, 5 m).

• Accessories: EPRO IP172 interconnection protector, MA130 mounting adaptor (DIN rail).