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Our Solutions: Testing

Advanced Reactive System Screening Tool (ARSST)

Thermal Screening

Our UK laboratory generates thermal screening and reaction calorimetry test data for your hazardous materials or reactions. The Advanced Reactive System Screening Tool (ARSST) test is used to quickly detect and identify potential reactive chemical hazards in processes.

The ARSST will aid in characterising and accurately determining the thermal decomposition onsets of materials, and inherent adiabatic temperature rises to desired reactions, by utilising its unique low phi-factor testing cell. This screening method will help inform decisions regarding your process scale up, by anticipating full scale process conditions and required thermal energy management.

The Sigma-HSE Advantage

Sigma-HSE is your single solution provider for a full range of thermal screening and calorimetry testing.

Our dedicated team of experts are committed to helping you identify potential reactive chemical hazards in your processes.

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Frequently asked questions

Industry standard tool for screening reactive systems, developed to compliment DIERS methodology for vent sizing.

The Advanced Reactive System Screening Tool (ARSST) is an example of a pseudo-adiabatic calorimeter batch reactor tool that is used to quickly identify potential reactive chemical hazards in processes.

It consists of a well-instrumented pressure vessel that usually holds a spherical glass test cell that can heat a 10 ml sample at a specified ramp or rate, determining onset temperatures up to 400 °C. The reaction mixture, magnetic stirrer and thermocouple are introduced to this cell, while the pressure inside the vessel is measured by a pressure transducer. Due to the unique heating method by a wraparound heater, the sample is kept in a pseudo-adiabatic mode and no heat loss to the surroundings occurs.

Typical data outputs can include the following:

  • Rate of pressure rise

  • Heat of reaction

  • Heat of mixing

  • Total adiabatic temperature rise

  • Onset temperature

  • Tempering temperature

  • Self-accelerating decomposition temperature

  • Time to maximum rate (induction time profile)

Flexible screening tool for analysis of varied Reactive Systems: basic reaction calorimetry possible with reagent mixing, thermal stability screening of mixtures and materials, and evolved pressure data to boot. Uses typically small sample sizes to compliment early-stage development.

Pseudo-adiabatic methodology for accurate determination of thermal decomposition onsets of materials, with the added benefit of pressure data collection.

How to get your materials tested

Receive quick and accurate ARSST testing data in just a few simple steps

Contact us

Get in touch with one of our experts so we can learn more about your specific process, unit operations and testing requirements. We'll then generate and send you a customised quote.

Prepare & ship

Prepare your samples including Material Safety Data Sheets where applicable, and ship them to our UK laboratory.

Thermal Screening, Analysis & Reports

Once we've received your samples, we'll begin testing, measuring and analysing. We'll then create and send you a custom in-depth report detailing the potentially hazardous properties of your materials.

Post-Project Support

If you need support after receiving your report, our after-project support team will be on hand to assist you with any questions you may have about your materials. We can also aid you in your understanding of what hazard prevention measures will be most suitable for your processes.

We also undertake the following thermal screening and calorimetry tests to simulate full scale process, and process upset conditions. ​

Please contact us if you have any bespoke combustible dust or powder testing requirements, or if you require consultancy services related to powder and combustible dust explosion safety.

Test your materials

Getting your hazardous materials tested is an important step to prevent fires, explosions and other process-related hazards. Get in touch to learn more about how we can assist you in keeping your process plant and unit operations safe from the risks of thermal runaway.


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