EPRO PR6423/010-010-CN 8mm Eddy Current Displacement Probe

PR6423/010-010-CN is a standard 8mm eddy current non-contact sensor manufactured by EPRO (ABB group), matched with CON021 signal converter to form a complete vibration measuring chain. It adopts eddy current induction principle to realize non-contact measurement of rotating metal shafts, avoiding abrasion and mechanical interference. It complies with API 670 and DIN 45670 industrial standards, widely deployed on steam turbines, gas turbines, compressors and large pumps for shaft condition monitoring.

This probe supports static and dynamic displacement measurement with high linearity and wide temperature adaptability. It delivers proportional voltage analog signals to machinery protection systems such as AMS3000 and Bently 3500 series. The CN suffix stands for Chinese standard cable and thread specification, featuring stainless steel armored cable, IP66 dust-proof and waterproof structure, stable operation under high-temperature, high-vibration industrial field environments.

Main Specifications

• Brand: EPRO (ABB); Model: PR6423/010-010-CN; Probe Head Diameter: 8mm
• Linear Measuring Range: 0~2mm; Static measuring window ±1.0mm; Recommended initial air gap 0.5mm
• Standard Sensitivity: 8 V/mm (203.2 mV/mil), tolerance ±5% within 0~45℃
• Linearity Error: ≤±0.025mm full scale; Frequency Response: DC ~ 10kHz (-3dB)
• Target Requirement: Minimum monitored shaft diameter 25mm, standard target material ferromagnetic steel 42CrMo4
• Temperature Range: Probe body -35℃ ~ +180℃; Armored cable -20℃ ~ +120℃
• Protection Class: IP66; Mechanical Mount: Standard external thread fixed installation
• Supporting Matching: CON021, CON031 signal conditioner; AMS3000 monitoring rack
• Cable Feature: Stainless steel flexible armored cable, CN version with domestic standardized wiring terminal

Core Functions

• Non-contact eddy current detection to capture real-time radial shaft vibration, axial thrust displacement, shaft eccentricity and oil film thickness of rotary equipment.
• Convert tiny air gap variation between probe tip and metal shaft into continuous proportional voltage signal, transmitted to signal converter for amplification and filtering.
• Provide core measuring data for turbine machinery protection system to trigger early warning or trip interlock against over-vibration, axial displacement overload faults.
• Stainless steel armored cable effectively suppresses electromagnetic interference from high-power frequency converters and high-voltage cabinets, ensuring stable signal transmission.
• Wide temperature resistant design eliminates measurement drift under long-term high temperature operation of turbine cylinder and bearing housings.
• Modular split measuring chain (probe + extension cable + converter) allows single damaged component replacement to reduce equipment maintenance downtime.

Application Scenarios

• Steam turbine, gas turbine, hydro turbine shaft vibration and axial displacement online monitoring in thermal power, hydropower plants.
• Condition monitoring of large industrial centrifugal compressors, blowers and circulating water pumps in petrochemical refineries.
• Rotary machinery protection system retrofitting and spare parts replacement for metallurgical rolling mill main transmission units.
• Supporting measuring probe for AMS3000, Bently Nevada 3500 series machinery safety monitoring racks.
• Long-term backup inventory of eddy current sensors for energy, chemical and heavy industry turbomachinery maintenance workshops.
• Nuclear power plant cooling pump and auxiliary rotary equipment radiation-resistant vibration monitoring measurement chain components.