OUR SOLUTIONS: CALORIMETRY TESTING

Carius Tube Testing

Our UK laboratory generates thermal screening and reaction calorimetry test data for your hazardous materials or potentially hazardous reactions. The Carius tube apparatus can be used as a small-scale screening tool to investigate exothermic activity and gas generation in your processes.

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Carius Tube Testing

The Sigma-HSE Advantage

Sigma-HSE is your single solution provider for a full range of thermal stability screening, chemical reaction hazards and calorimetry testing. Our dedicated team of experts are committed to helping you identify and understand potential reactive chemical hazards in your processes.

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Frequently asked questions

What is your standard methodology?

Recognised industry standard test, developed first at ICI and AstraZeneca hazard labs, and included in ABPI and IChemE publications on Chemical Reaction Hazard Assessment.

What is the Carius Tube test?

The Carius tube apparatus is used as a small-scale screening tool for thermal stability. It is primarily undertaken to investigate exothermic activity and identify the pressure effects of permanent gas generation. The Carius tube can also aid in the detection of exothermic activities such as onset temperatures.

How does the Carius Tube test work?

The Carius tube apparatus works by placing approximately 10 g of a test material in a heavy-walled sealed glass tube and then placing it in an oven. The oven temperature is then increased at a controlled rate (typically 0.5 °C/min). The temperature and pressure of the test cell are then detailed and recorded to assess the thermal stability of the sample upon heating.

What does Carius Tube data do?

A differential temperature reading between the sample and baseline of the oven can indicate and quantify energetic events, and whether they are exothermic or endothermic. A plot of Ln (pressure) versus the reciprocal of temperature can also indicate the onset temperature of gas generation.

What are the benefits of the Carius Tube test?

The Carius Tube test can quickly identify thermal regions of interest (exothermic events, structural changes, permanent gas generation), which can then in turn be investigated in more detail using adiabatic or more precise techniques. It is often run as a screening test complimentary to DSC (Differential Scanning Calorimetry), as it provides the valuable pressure data not available from the DSC.

How to get your materials tested

Receive quick and accurate 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 material samples and ship them to one of our globally accredited laboratories (UK or India).

Analysis & Reports

Once we've received your samples, we'll begin testing and analysing. We'll then create and send you an actionable 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.

Discover our range of chemical reaction hazard testing solutions

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

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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