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    Samotics–Southern Water SAM4 deal: condition monitoring lessons for engineers

    December 3, 2025|

    Reviewed by Tom Sullivan

    Samotics–Southern Water SAM4 deal: condition monitoring lessons for engineers

    First reported on The Construction Index

    30 Second Briefing

    Southern Water has signed a £7m, six-year framework with Dutch firm Samotics to roll out its SAM4 electrical signature analysis (ESA) condition monitoring system across around 600 wastewater and clean water sites in southern England. A one-year trial on 1,458 critical assets detected 63 failures on submersible sewage pumps and other pumping equipment, avoiding an estimated £5m in damage and penalties by catching blockages, air locks and mechanical faults early. SAM4 analyses real-time current and voltage signals, with AI plus human-in-the-loop validation delivering 97% fault-classification accuracy and under 1% false positives via a remote dashboard.

    Technical Brief

    • Data acquisition units are installed inside motor control cabinets, avoiding any intervention on pumps or pipework.
    • ESA monitoring covers both wastewater and clean water networks, including hard-to-access submersible sewage pumps.
    • Fault types detected include misalignment, bearing wear, pump blockages and air locks on rotating equipment.
    • AI classifies deviations in real-time current and voltage signals into specific, actionable fault categories.
    • Human-in-the-loop review of alerts is integral to achieving the quoted 97% diagnostic accuracy.
    • Remote SAM4 dashboards provide automatic records of each asset, incident and maintenance action for auditability.

    Our Take

    Within the 124 Infrastructure stories in our database, very few UK & Ireland pieces involve a multi-year, multi‑million‑pound framework purely for condition monitoring, signalling that Southern Water is treating predictive analytics as core network infrastructure rather than a bolt‑on pilot.

    A 97% accuracy rate with fewer than 1% false positives is unusually high among safety‑tagged Product items in our coverage, which suggests SAM4‑type systems are now mature enough to be embedded into operational decision‑making without overwhelming maintenance teams with nuisance alarms.

    Rolling this out across roughly 600 sites in southern England positions Southern Water at the more advanced end of UK utilities in our database for digital asset management, which is likely to put competitive and regulatory pressure on other operators in the region to demonstrate similar risk‑reduction capabilities by around 2026.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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