Description

EPRO PR9670/010-000-ex (Electromagnetic Eddy Current Displacement Sensor)
PR9670/010-000-ex is an electromagnetic eddy current displacement/vibration sensor from Germany’s EPRO (now part of Emerson), used for non-contact measurement of shaft displacement, radial vibration, and eccentricity in rotating machinery (such as turbines, compressors), and is paired with the preamplifier CON021 and the MMS6000 monitoring system.

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Model Disassembly
PR9670: EPRO New Generation Eddy Current Sensor Series
010: Probe diameter 10mm, standard range 0.25–4.0mm
000: Standard cable length (0=5m), standard sensitivity, no special options
-ex: Explosion-proof certification (ATEX/IECEx), suitable for hazardous areas Core parameters
Measurement principle: Electromagnetic eddy current effect (non-contact electromagnetic induction)
Probe diameter: 10mm (standard)
Linear measurement range: 0.25–4.0mm (recommended operating point 2.0mm)
Sensitivity: 8mV/μm (8V/mm), linear error ≤ ±1%
Frequency response: DC–10kHz (covering vibration and displacement)
Operating temperature: -35°C ~ +180°C (probe), -35°C ~ +85°C (cable)
Output signal: Analog voltage (proportional to gap, powered / demodulated by preamplifier)
Compatible preamplifier: CON021 (must be matched, provides -24V power supply and signal processing)
Explosion-proof rating: Ex d IIC T6 (-ex suffix)
Protection rating: IP66
Weight: Approximately 0.5kg (including 5m cable)

Main functions
Rotating machinery condition monitoring
Accurately measure radial vibration, axial displacement, eccentricity, and expansion difference of the shaft. These are the core measurement points of TSI (turbo-generator safety monitoring).
Suitable for high-temperature / hazardous areas
Wide temperature range (-35°C to +180°C) + explosion-proof (-ex), suitable for Zone 1/2 hazardous areas in refineries, chemical plants, and oil and gas platforms.
Highly reliable industrial-grade design
Stainless steel probe + armored cable, resistant to vibration and oil contamination, suitable for 42CrMo4/4140 steel shafts (standard measured materials).
System compatibility
seamlessly integrate with monitoring platforms such as EPRO MMS6000 and Emerson AMS, supporting fault diagnosis, trend analysis, and interlock protection.
Typical application
Thermal power / Nuclear power: Steam turbine, generator shaft vibration / displacement monitoring
Petrochemical industry: Compressor, pump, fan rotor dynamic clearance measurement
Oil and gas extraction: Offshore platforms, gas turbines hazardous area condition monitoring