METRIX MX8030-080-00-05 MX8031-080-00-05 Proximity Probe Extension Cable – MX8030 MX8031 Series

METRIX MX8030-080-00-05 / MX8031-080-00-05 Proximity Probe Extension Cable — Signal Transmission Architecture in Eddy-Current Monitoring Loops

The MX8030-080-00-05 and MX8031-080-00-05 are 5-meter coaxial extension cables engineered by METRIX Instrument Co. to bridge the physical gap between an eddy-current proximity probe and its paired oscillator-demodulator driver in rotating machinery protection systems. Within an API 670-compliant monitoring loop, the extension cable is not a passive conductor — it is a precision-matched transmission element whose characteristic impedance, capacitance per unit length, and dielectric properties are factory-calibrated to maintain the resonant tuning of the probe-driver system. Any deviation in these parameters shifts the driver’s output voltage-gap curve, introducing measurement error that cannot be corrected by software compensation alone.

The MX8030 series targets standard-temperature industrial environments, while the MX8031 series is specified for elevated-temperature zones where cable jacket and dielectric materials must sustain mechanical and electrical integrity under continuous thermal stress. Both variants share the same 5-meter (080 = 8.0 m total system length from probe tip, 00 = standard connector, 05 = 5 m extension) system-length encoding convention used across the METRIX proximity system catalog, ensuring direct interchangeability within matched probe-driver sets without recalibration of the driver’s gap voltage output.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The functional role of the MX8030/MX8031 extension cable is frequently underestimated in field procurement. In an eddy-current proximity measurement chain, the oscillator embedded in the driver generates a high-frequency carrier signal — typically in the 1 MHz range — that propagates through the cable to energize the probe coil. The probe’s inductance changes as a conductive target approaches, and this change modulates the oscillator’s amplitude. The modulated signal returns through the same coaxial path to the demodulator stage in the driver, which converts it to a DC voltage proportional to gap distance.

This bidirectional signal path means the cable’s electrical characteristics directly participate in the resonant circuit. The total system capacitance — probe coil capacitance plus cable capacitance — must fall within the driver’s tuning range. METRIX encodes the total system length (probe cable + extension cable) in the part number to guarantee this. The “080” field in MX8030-080-00-05 denotes an 8.0-meter total system length, meaning the 5-meter extension is matched to a 3-meter probe cable. Substituting a non-METRIX cable with different capacitance per unit length shifts the resonant point, compressing or expanding the driver’s linear output range and degrading measurement accuracy — a failure mode that is difficult to diagnose without a calibrated gap simulator.

The braided copper shield with greater than 90% optical coverage provides two functions: it returns the oscillator signal current with minimal resistive loss, and it attenuates external electromagnetic interference from variable-frequency drives, high-current bus bars, and RF sources common in turbomachinery environments. The MX8031’s PTFE dielectric maintains its permittivity within ±2% across the full -55°C to +175°C range, preventing thermal drift of the cable capacitance from introducing apparent gap measurement error during machine startup and shutdown thermal cycles — a critical requirement in hot-section turbine monitoring where bearing housing temperatures can exceed 150°C.

Connector termination geometry is precision-machined to maintain coaxial alignment under repeated mating cycles. The center pin and outer shell are dimensioned to preserve impedance continuity through the connector interface, preventing reflections that would appear as noise on the driver output at the frequencies used by METRIX oscillators.

System Integration Benefits

• Drop-in replacement without recalibration: Matched system-length encoding ensures the driver’s gap voltage curve remains valid after cable replacement, eliminating the need for a calibrated gap simulator during maintenance shutdowns.
• Deterministic measurement latency: Fixed cable propagation delay within the matched system keeps the driver’s demodulator phase margin stable, supporting machinery protection systems that require trip response times under 20 ms per API 670 requirements.
• EMC immunity in high-noise environments: >90% shield coverage suppresses common-mode interference from VFDs and power electronics, maintaining signal-to-noise ratio on the driver output above the threshold required for reliable 4–20 mA or voltage transmission to DCS/PLC analog input cards.
• Thermal stability for hot-section monitoring (MX8031): PTFE dielectric capacitance drift below ±2% across the full operating range prevents false gap readings during thermal transients, reducing nuisance trips in turbine protection systems.
• Mechanical durability in industrial routing: Braided jacket construction resists abrasion from cable tray edges and conduit entry points, maintaining shield integrity over the cable’s service life without requiring protective sleeving in most installations.
• API 670 compliance for machinery protection: Direct compatibility with API 670-compliant monitoring panels from Bently Nevada, METRIX, and equivalent systems, supporting regulatory compliance in petrochemical and power generation facilities.
• Traceable lot documentation: Each genuine METRIX cable ships with manufacturer lot traceability, supporting maintenance record requirements in ISO 55000 asset management frameworks and insurance audit trails.
• Reduced diagnostic ambiguity: Using a matched OEM cable eliminates cable electrical properties as a variable during fault diagnosis, allowing maintenance engineers to isolate probe, driver, or process faults without cable characterization measurements.
• Compatibility with METRIX MX2034/MX2044 drivers: Verified electrical compatibility with the full METRIX driver product line, including legacy and current-generation oscillator-demodulator modules, without firmware or hardware modification.
• Supports multi-channel monitoring architectures: Consistent cable capacitance across matched sets enables uniform channel-to-channel calibration in multi-probe monitoring panels, simplifying commissioning of 8- and 16-channel protection systems.

Quality Assurance & Global Logistics

Every MX8030-080-00-05 and MX8031-080-00-05 unit supplied by siemensplc.com is sourced through verified METRIX distribution channels. Incoming stock is inspected against METRIX factory documentation: part number label, date code, connector finish, jacket marking, and packaging integrity are verified before the unit enters our inventory. We do not supply rebranded, refurbished, or third-party substitute cables under METRIX part numbers.

A 12-month warranty from the date of dispatch covers manufacturing defects. Units that arrive damaged or non-conforming are replaced or credited without dispute. Certificate of conformance documentation is available on request for projects requiring traceability records.

Logistics operations are based in Xiamen, China, with established export procedures for industrial components. Standard international shipments are dispatched via DHL Express, FedEx International Priority, or UPS Worldwide, with transit times of 3–7 business days to most destinations in Southeast Asia, the Middle East, Europe, and the Americas. Commercial invoice, packing list, and certificate of origin are provided with every export shipment. HS code guidance and export compliance support are available for customers in regulated procurement environments. Domestic China orders are fulfilled via SF Express with next-day delivery to major industrial centers.

For urgent plant maintenance requirements, same-day dispatch is available for orders confirmed before 14:00 CST. Contact our technical team to confirm stock availability and lead time before raising a purchase order.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.