Maintenance at sea is never just a technical decision — it’s a matter of cost, compliance, and crew safety. Marine operators traditionally rely on planned (preventative) maintenance or reactive fixes when something breaks. But in an industry where downtime is expensive and compliance is non-negotiable, there’s a growing shift toward Condition-Based Monitoring (CBM).
In this explainer, we break down the differences between these maintenance strategies, highlight where CBM adds value, and explain why monitoring water-in-oil (WiO) — using Rivertrace’s Smart WiO Sensor — is critical in protecting engines and equipment across large vessels and offshore platforms.
Condition Monitoring (CM) is the collection of real-time data on equipment health, enabling action only when required. It’s based on actual wear, contamination, or anomalies.
When applied to lubricating oil systems, CM helps operators:
CBM uses condition monitoring data to make informed maintenance decisions, shifting from time-based routines to performance-based intervention. This strategy reduces downtime, and reduces costs.
One of the earliest and most critical indicators of equipment issues is the presence of water in lubricating oil.
The Smart WiO Sensor offers a simple, continuous, and accurate method to detect early water presence in lubricating oils, whether on a cargo ship, offshore support vessel or oil platform.
Measures dissolved water, not just free or emulsified water
Real-time data output for proactive decision-making
Early warning system to avoid equipment failure
Compatible with a range of oil types (mineral/synthetic)
Easily installed inline with minimal disruption
Prevents unplanned downtime by detecting water contamination early
Protects engines, gearboxes, and hydraulic systems from damage
Assists with OEM data requirements
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Reduces reliance on manual sampling and testing kits
Supports Condition-Based Maintenance programmes
The Smart WiO Sensor from Rivertrace is highly relevant for:
Equip your fleet with the Rivertrace Smart WiO Sensor and move from guesswork to real-time insight.
Our extensive range of monitor and sensor products cover applications for legislative discharge requirements, condition monitoring equipment and digital technology for enhanced efficiency and compliance.
IMO – the International Maritime Organization – is the United Nations specialized agency with responsibility for the safety and security of shipping and the prevention of marine and atmospheric pollution by ships.
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Water ingress into lubricating or hydraulic oil is a leading cause of internal corrosion, reduced lubrication performance, and premature equipment failure. In marine environments, water contamination can occur due to condensation, seal leaks, or coolant ingress — especially in engines, gearboxes, and thrusters. Monitoring water content continuously with an oil condition monitor allows marine engineers to detect issues early and avoid operational downtime or costly repair work.
Most marine test kits only detect free or emulsified water, which is typically visible after contamination has progressed. The Smart WiO Sensor uses advanced technology to detect dissolved water content before it becomes visible or causes damage. This early detection makes it a true oil condition monitoring sensor for proactive maintenance on ships and offshore equipment.
The Smart WiO sensor is ideal for use in:
Yes. The sensor is designed to integrate seamlessly with onboard SCADA, PMS, or fleet-wide condition monitoring platforms. This supports real-time data visibility and aligns with fleet-wide operational performance monitoring strategies.
The sensor delivers highly accurate measurements of water saturation in oil, allowing ship engineers and technical managers to make data-led decisions. It supports the move toward condition-based maintenance — reducing the need for unnecessary oil changes or emergency repairs.
Rivertrace provides full support including:
Early identification of water contamination prevents catastrophic failures in engines and hydraulic systems. By using the Smart WiO as part of an oil condition monitor strategy, ship operators reduce unscheduled maintenance and extend the life of equipment.
Yes. The sensor’s robust construction withstands salt spray, vibration, pressure changes, and extreme temperatures commonly experienced at sea. It’s engineered specifically for marine and offshore applications — from engine rooms to topside and subsea installations.
Contact us to discuss your requirements of Oil Condition Sensor Supplier. Our experienced sales team can help you identify the options that best suit your needs.