How a long-term partnership strengthened field reliability and supply-chain agility for a global water monitoring manufacturer
About the client
This U.S.-based manufacturer designs advanced water-quality monitoring systems used by government agencies, environmental researchers, and consulting firms around the world. Their instruments are deployed for long-term monitoring in fresh and saltwater, demanding rugged, submersible cable assemblies that protect signal integrity in continuously wet, often corrosive environments.
The challenge
In 2009, the client needed a U.S. manufacturing partner who could simultaneously improve quality, cost, and on-time delivery for their cable assemblies. They were sourcing raw cable from one supplier and having assemblies completed by another, resulting in a fragmented supply chain, extended lead times, and variability in performance.
They required a partner who could:
- Own the process from raw cable through finished assembly to simplify logistics and control quality.
- Meet stringent electrical and mechanical specifications suitable for continuous submersion.
- Deliver waterproof, highly durable assemblies with specific aesthetic and functional requirements, including matte black jackets.
- Achieve a minimum flex life of 100,000 cycles at room temperature without shorts or performance failures.
- Collaborate closely with their engineering team to support ongoing product innovation.
The solution
Mercury Wire consolidated the entire build — from custom cable design through final assembly and test — under one roof. This end-to-end ownership reduced handoffs, improved consistency, and allowed Mercury to engineer both for performance in the water and flow in the client’s supply chain.
Key elements of the solution included:
- Precision engineering and testing
Mercury developed custom molds and strain reliefs tailored to the client’s instruments, then built a dedicated flex test rig to validate cable performance against the 100,000-cycle flex requirement under simulated field conditions. Proprietary waterproofing processes and epoxy specifications were defined to maintain both electrical integrity and mechanical robustness in submerged environments.
- Process standardization and alignment
Early in the engagement, differences between metric and U.S. industry standards created friction in validation and documentation. Mercury worked side-by-side with the client’s engineers to establish shared baselines for cable lengths, tolerances, and test protocols, enabling faster approvals and smoother ongoing collaboration.
- Color and material specification control
To meet the client’s requirement for a specific matte black jacket appearance, Mercury implemented objective color measurement tools and defined acceptable ranges, ensuring consistent visual quality from run to run.
- Flexible, responsive supply model
Mercury created a dedicated production cell for this product family, manages finished-goods inventory, and typically fulfills release orders within five business days. This supports both forecast-based planning and short-notice demand without compromising quality.
- ERP integration and traceability
Mercury enhanced its internal systems to capture and store test data and process parameters for every batch. This digital recordkeeping gives the client real-time access to quality and traceability information when needed for audits, investigations, or internal reporting.
The Results
What began as a single proof-of-concept has grown into a multi-product partnership spanning more than 7 cables and 20 assembly families across the client’s environmental monitoring platforms. Mercury also now supplies raw cable to some of the client’s other contract manufacturers for applications beyond Mercury’s own assembly capabilities.
Strategic outcomes:
- Field-proven performance
Cable assemblies meet demanding flex-life and waterproofing requirements, supporting accurate, long-term water quality data collection in challenging conditions.
- Simplified, more reliable supply chain
Consolidating cable and assembly with Mercury has reduced lead times, improved on-time delivery, and eliminated a layer of complexity from the client’s supply chain.
- Continuous innovation support
Mercury’s engineering team collaborates directly with the client on new product concepts, including complex vented cable designs and specialized compounds (such as flame-retardant materials) for unique applications.
- Scalable production with flexibility built in
Dedicated capacity and an inventory strategy aligned to the client’s rhythms allow Mercury to respond quickly to both planned and unplanned demand.
- Improvements that benefit all customers
Process, test, and ERP enhancements developed for this program have been extended across Mercury’s broader operations, raising the bar for other customer engagements.
Conclusion
This long-standing partnership demonstrates how engineering collaboration, process discipline, and flexible supply strategies can unlock performance in demanding environmental applications. By aligning closely with the client’s technical requirements and operational needs, Mercury Wire has helped enable confident, long-term water-quality monitoring in harsh conditions — while evolving its own capabilities in testing, traceability, and agile fulfillment to better serve future projects.
Ready to explore what’s possible with your next custom cable or assembly? Connect with Mercury Wire to start the conversation.