Product Core Brief
- Model: PR6424/000-131 (Probe Assembly) + CON031 (Screw-Terminal Single-Channel Preamplifier)
- Brand: EPRO (Emerson Machinery Health Monitoring, Germany)
- Series: M18 long-range eddy current probe series, matched exclusively with CON031 terminal-type preamplifier for MMS3000 / A6000 turbo machinery protection racks
- Model Code Decode = M18×1.5 thread, 18mm large sensing head, ±2mm full linear span for axial thrust + radial vibration/000 = 0 meters factory pre-integrated cable (probe head only, user custom external coaxial cable required)-131 = Bare stripped open cable wire ends, heavy-duty reinforced terminals, no Lemo plug, dedicated wiring to rear screw terminals
- Core Function: Factory pre-calibrated non-contact eddy current measurement kit for turbine axial thrust displacement, large rotor radial vibration and bearing clearance monitoring on steam/gas turbines, centrifugal compressors and critical rotating SIL safety protection loops, fully compliant with API 670 machinery protection standard
- Product Type: Full custom wiring sensing kit (M18 probe head only + bare reinforced wire terminals + rack-mount screw-terminal signal converter)
- Key Specs: M18 stainless heavy-duty housing, 18mm sensing tip; ±2mm total linear measuring range; factory calibrated 4V/mm sensitivity matched for ; zero factory cable, bare -131 reinforced wire terminals for field custom long-distance coaxial wiringNote: Discontinued legacy machinery monitoring hardware, stocked as unopened factory calibrated new surplus; probe and must be used as a matched calibrated set to guarantee linear measurement accuracy.Key distinction vs CON021: has screw terminal rear wiring only, no front Lemo port, exclusively for bare-wire probes like -030/-131 suffix; CON021 uses front Lemo plug for molded plug probes.
Key Technical Specifications
/000-131 Probe Assembly
1. Mechanical Structure
- Thread standard: M18 × 1.5 stainless steel thick mounting housing for turbine thrust bearing installation
- Sensing head diameter: 18mm large target coverage, stable signal for large-diameter rotors
- Cable code /000: No factory integrated braided cable at probe body; user installs custom-length high-temperature coaxial cable on-site
- Cable suffix -131: Reinforced thick bare stripped coaxial wire terminals, anti-break, optimized for long custom cable runs; no molded Lemo plug
- Minimum custom cable bend radius: ≥50mm, sharp tight bends damage internal coaxial core and cause signal attenuation drift
- IP rating: Probe sensing head IP67; custom field cable IP65 cabinet grade
2. Measurement Performance
- Full linear measuring span: ±2 mm (4mm total travel, dedicated axial thrust monitoring)
- Recommended installation nominal midpoint air gap: 2.7 mm
- Calibrated sensitivity (matched ): 4 V/mm (101.6 mV/mil)
- Max linearity error: ≤ ±1.0% full scale ( series premium accuracy)
- Frequency response: DC ~ 10kHz (-3dB), covers slow thrust drift and mid-frequency rotor vibration
- Thermal drift index: Zero point drift 200mV / 100K; sensitivity drift ≤0.3% full scale per 100K
- Long-term zero drift: ≤0.3% FS over 12 months continuous turbine operation
- Factory impedance compensation: Calibrated to match user-specified custom cable length at time of manufacture
3. Thermal & Environmental Limits
- Probe head continuous working temperature: -35°C ~ +180°C; transient peak short-term +200°C
- Custom field coaxial cable rating: Max 200°C PTFE high-temperature insulation
- Storage & transport temperature: -40°C ~ +70°C
- Vibration resistance: 5g continuous vibration at 60Hz bearing housing mounting
- Working ambient pressure: Uniform 2bar external process cabinet environment
- Minimum target carbon steel shaft diameter: 40mm; stainless steel/aluminum coated rotors require on-site recalibration
Matched Screw-Terminal Preamplifier Reference Parameters
