METRIX MX8030/MX8031 Extension Cables

Technical Dossier

Product Details And Specifications

METRIX MX8030/MX8031 Series: Comprehensive Extension Cable Range and Technical Overview

The METRIX MX8030 and MX8031 extension cable series are purpose-engineered interconnect components for eddy-current (proximity) vibration monitoring systems, primarily used in conjunction with METRIX proximity probes and oscillator/demodulator drivers. These cables are deployed across high-criticality rotating machinery applications in petrochemical refineries, LNG processing plants, nuclear power auxiliary systems, offshore platforms, and steel mill drive trains — environments where signal integrity over the probe-to-driver cable run is non-negotiable.

The MX8030 series covers standard armored extension cables, while the MX8031 series addresses specific shielding and connector configurations required for hazardous area (ATEX/IECEx) installations. Both series are designed to maintain the precise capacitance and impedance characteristics required by the API 670 standard for machinery protection systems.

The Evolution of MX8030/MX8031 Architecture

METRIX (a brand under Roper Technologies / Amphenol Advanced Sensors lineage) developed the MX8030/MX8031 cable family as a direct complement to its ST5484E, ST5490, and 5550 series oscillator-demodulators and the 7200 series proximity probe systems. Early-generation extension cables in the 1990s used simple coaxial construction with BNC terminations. The MX8030/MX8031 generation introduced:

• Controlled-capacitance coaxial construction — maintaining the 1000 pF/m ±5% tolerance required for accurate gap voltage output across the full cable run.
• Stainless steel armor jacketing — providing mechanical protection in high-vibration, high-temperature plant environments.
• MIL-spec connector terminations — replacing legacy BNC with threaded coaxial connectors for vibration-resistant mating.
• Length-coded variants — the numeric suffix (e.g., -080 = 8.0 m, -050 = 5.0 m) allows system integrators to precisely match cable run to driver input range without trimming or splicing.

As the broader METRIX product line has matured, the MX8030/MX8031 series has entered a mature/end-of-active-production phase. OEM lead times have extended significantly. Procurement teams managing long-term maintenance contracts (LTMAs) for turbines, compressors, and pumps must now plan for alternative sourcing channels to avoid unplanned downtime.

MX8030/MX8031 Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented range of METRIX MX8030 and MX8031 extension cables, organized by cable length and configuration. Each model is a direct-fit replacement for the corresponding probe/driver system cable run.

MX8030 Series — Standard Extension Cables

• MX8030-020-00-05: 2.0 m standard coaxial extension, MIL-spec connectors, 1000 pF/m, general industrial.
• MX8030-030-00-05: 3.0 m extension cable, controlled capacitance, stainless armor jacket.
• MX8030-050-00-05: 5.0 m extension, standard configuration, suits most turbine bearing housings.
• MX8030-080-00-05: 8.0 m extension cable, most common field-installed length for large compressor trains.
• MX8030-090-00-05: 9.0 m extension, used where probe-to-driver distance exceeds standard bay spacing.
• MX8030-100-00-05: 10.0 m extension, maximum standard length for single-cable runs per API 670.
• MX8030-150-00-05: 15.0 m extension, requires driver input range verification before installation.
• MX8030-200-00-05: 20.0 m extension, long-run configuration for remote monitoring panels.

MX8031 Series — Hazardous Area / Enhanced Shielding Extension Cables

• MX8031-020-00-05: 2.0 m, ATEX-rated shielding configuration, Zone 1/Zone 2 installations.
• MX8031-030-00-05: 3.0 m, enhanced EMI shielding, suitable for high-interference drive environments.
• MX8031-050-00-05: 5.0 m, hazardous area variant, double-shielded coaxial construction.
• MX8031-080-00-05: 8.0 m, most-ordered MX8031 length, offshore platform standard configuration.
• MX8031-090-00-05: 9.0 m, hazardous area, extended run for classified area panel routing.
• MX8031-100-00-05: 10.0 m, ATEX/IECEx compliant, full-length hazardous area cable run.
• MX8031-150-00-05: 15.0 m, long-run hazardous area cable, requires system gap voltage recalibration.
• MX8031-200-00-05: 20.0 m, maximum-length classified area extension, used in nuclear auxiliary systems.

Note: The suffix -00-05 denotes standard connector termination type. Custom termination variants (e.g., -01-05, -02-05) exist for specific OEM integrations — contact DriveKNMS with your exact part number for cross-reference.

Sourcing Hard-to-Find & Obsolete MX8030/MX8031 Parts

With METRIX OEM production of the MX8030/MX8031 series winding down, procurement teams face three practical challenges:

1. Extended OEM lead times (16–52 weeks) — unacceptable for unplanned maintenance events on critical rotating machinery.
2. Minimum order quantity (MOQ) constraints — OEM channels typically require bulk orders, creating excess inventory risk for single-unit replacement needs.
3. Counterfeit risk in the gray market — extension cables with incorrect capacitance values will cause systematic measurement error across all connected channels, potentially masking real vibration faults.

DriveKNMS maintains a verified inventory network for MX8030 and MX8031 cables sourced from decommissioned plant spares, authorized distributor overstock, and factory-sealed OEM surplus. Every unit is inspected for connector integrity, cable continuity, and capacitance compliance before dispatch. We provide full traceability documentation — including source records and inspection reports — to satisfy plant maintenance and HSE audit requirements.

For obsolete or discontinued length variants, DriveKNMS can source equivalent-specification cables from qualified alternative manufacturers, with full dimensional and electrical cross-reference documentation provided for your engineering team's approval.

Quality Control for the MX8030/MX8031 Range

Extension cables for eddy-current proximity systems are not passive components — their electrical characteristics directly affect the accuracy of every vibration and position measurement in the monitoring loop. DriveKNMS applies the following verification protocol to all MX8030/MX8031 units:

• Capacitance measurement: Each cable is measured at 1 kHz using a calibrated LCR meter. Acceptance criterion: 1000 pF/m ±5% per API 670 Annex D.
• DC resistance check: Center conductor and shield resistance verified against OEM specification to detect internal breaks or high-resistance joints.
• Connector mating torque test: Threaded connectors verified for correct thread engagement and contact resistance <10 mΩ.
• Jacket and armor inspection: Visual and tactile inspection for kinks, crush damage, or armor wire fractures that could cause intermittent faults under vibration.
• End-to-end continuity and isolation test: Shield-to-center conductor isolation verified at 500 VDC to confirm dielectric integrity.

All test results are documented and available upon request. Shipments include a certificate of conformance (CoC) and, where applicable, country-of-origin documentation for customs compliance.

Shipping: DHL Express / FedEx International Priority. Typical dispatch: 2–5 business days from order confirmation. Multi-currency payment accepted (USD, EUR, HKD, CNY). 12-month warranty on all supplied units.