{"product_id":"epro-pr6423-001-121-eddy-current-probe-sensor","title":"Epro PR6423\/001-121 Eddy Current Probe Sensor","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Emerson EPRO\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePR6423\/001-121\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-precision 8 mm eddy-current proximity probe developed for continuous monitoring of rotating machinery dynamics. It is designed to measure shaft displacement-related parameters including vibration, axial movement, eccentric position, and rotational instability.\u003c\/p\u003e\n\u003cp\u003eThe probe is typically deployed in conjunction with EPRO signal conditioning units such as CON021 or CON041, forming a complete displacement measurement chain used in API 670-aligned protection and monitoring systems.\u003c\/p\u003e\n\u003cp\u003eIts compact probe geometry, high thermal endurance, and rugged construction make it suitable for demanding turbomachinery environments.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eMeasurement Principle\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis sensor operates using eddy-current induction technology. Variations in the gap between the probe tip and conductive shaft surface generate proportional electrical signals, which are processed by a compatible converter to derive precise displacement values.\u003c\/p\u003e\n\u003cp\u003eThe system is optimized for both static and dynamic measurement tasks in high-speed rotating equipment.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eSensing Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMeasurement principle: Eddy-current non-contact displacement sensing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProbe diameter: 8 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLinear measuring range: 2.0 mm (80 mil)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNominal air gap: 0.5 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSensitivity: 8 V\/mm (±5%)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLinearity deviation: ±0.025 mm full scale\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFrequency response: DC to 10 kHz\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMinimum shaft diameter: ≥25 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTarget material: Magnetic steel (e.g., AISI 4140 \/ 42CrMo4 equivalent)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eMechanical Construction\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eThread type: M10 × 1 or 3\/8”-24 UNF\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSensor body: Stainless steel housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSensing tip: High-performance PEEK polymer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConnector material: Nickel-plated brass\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCable insulation: PTFE high-temperature resistant jacket\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStandard cable diameter: 2.8 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eArmored cable option: ~6 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eEnvironmental Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eOperating temperature (probe): –35 °C to +180 °C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCable\/connector temperature limit: up to +150 °C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProtection rating: IP66 (dust-tight, jet-water resistant)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eShock resistance: up to 40 g mechanical load\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMinimum bend radius: 25 mm (standard cable), 35 mm (armored version)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSignal Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eOutput signal type: Raw eddy-current analog signal (requires CON021\/CON041 conditioner)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStable performance across wide thermal gradients\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh immunity to electromagnetic interference in industrial environments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptimized for long-term drift stability in continuous monitoring systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSystem Integration Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePR6423\/001-121\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis not a standalone transmitter. It requires a compatible EPRO signal converter for calibration, linearization, and standard output generation (4–20 mA or voltage output).\u003c\/p\u003e\n\u003cp\u003eTypical matched systems include:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eCON021 signal conditioner\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCON041 advanced processing module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis pairing ensures factory-aligned calibration and eliminates field adjustment requirements.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eIndustrial Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eSteam and gas turbine shaft vibration monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCentrifugal and axial compressor displacement tracking\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePump rotor eccentricity detection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGearbox shaft alignment and thermal expansion analysis\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-speed rotating machinery condition monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does PR6423\/001-121 provide direct 4–20 mA output?\u003c\/strong\u003e\u003cbr\u003eA: No. It outputs a raw eddy-current signal and requires a CON-series signal conditioner.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this sensor suitable for high-temperature turbines?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The probe supports continuous operation up to +180 °C.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can it be used for vibration measurement?\u003c\/strong\u003e\u003cbr\u003eA: Yes. It is widely used for shaft vibration and displacement-based condition monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What makes this model different from larger probes?\u003c\/strong\u003e\u003cbr\u003eA: The 8 mm design allows installation in compact bearing housings while maintaining high sensitivity.\u003c\/p\u003e","brand":"Emerson","offers":[{"title":"Default Title","offer_id":43222218637402,"sku":"PR6423\/001-121","price":178.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/PR6423000-1111_8b32bd38-c1eb-4c92-a7af-7cd20665c981.jpg?v=1776323957","url":"https:\/\/www.plcmasters.com\/fr\/products\/epro-pr6423-001-121-eddy-current-probe-sensor","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}