Fluid Guardian | OPC® Testing and Continuous Fluid Monitoring

Validating Thermal Fluid Performance Where It Matters

Fluid Guardian is Thermal Fluid Solutions’ system-specific approach to validating and protecting thermal fluid performance.

Rather than relying on generic laboratory limits or industry averages, Fluid Guardian focuses on how the fluid behaves in your system, under your operating temperature and pressure conditions. This delivers a true performance test and removes uncertainty from fluid-related decision-making.

OPC® Testing and Rank, A Full Health Check for Your Thermal Fluid

At the core of Fluid Guardian is the OPC® suite of tests and analysis.

OPC® testing provides a detailed assessment of degradation products and how they impact individual system operating conditions. It sits above and alongside traditional thermal fluid tests to build a complete picture of fluid condition and performance.

The OPC® Rank translates this analysis into a clear, system-specific performance indicator, showing whether a fluid is stable, conditionally unstable, unstable, or no longer fit for use.

This approach supports informed decisions about continued operation, recovery, or intervention.

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Real Fluid Simulations – Understanding Root Cause, Not Symptoms

Fluid Guardian includes real fluid simulations that analyse specific degradation products and how they affect system behaviour.

This allows us to identify root causes and develop targeted recovery strategies rather than treating symptoms. Analysis may include:

Acid generation and removal
Low boiler formation and online removal
High boiler generation, carbon solids, sludge, and deposition
Moisture ingress and removal, including high-temperature and sub-zero systems
Ferrous material identification and removal
Contamination identification, separation, and removal

REACT Auto Sampler – Continuous, Intelligent Fluid Monitoring

Fluid Guardian is supported by REACT, a patented intelligent auto-sampling system designed for 24/7 fluid condition monitoring.

REACT automatically samples and tracks the indicators that most affect heat transfer performance and fluid stability. This enables early detection of degradation, consistent validation over time, and intervention before performance is compromised.

Unlike manual sampling, REACT provides repeatable, reliable data without disrupting operations.

From Validation to Control

Fluid Guardian removes guesswork from thermal fluid management. By combining OPC® testing, real fluid simulations, and continuous monitoring, it allows fluid performance to be validated, tracked, and managed throughout its working life.

The result is improved reliability, safer operation, and extended fluid life, without unnecessary replacement or downtime.

Need expert support with your thermal fluid system?

Speak to our expert team to discuss how we support your sector and how we can help  improve safety, performance, and reliability.

+44 (0)1298 815862

office@thermalfluidsolutions.com