The fast screening of thermal hazards can be peformed with the Thermal Screening Unit (TSu). It uses samples typical from 0.5 to 5g, will generate both temperature pressure data and hence can be considered a better alternative to classical DSC/DTA methods.
For Effective reaction hazards screening, two critical peices of data are needed
- The "Onset" Temperature for the reaction - where the exotherm is detected
- The pressure generated by the runaway - key indicator of hazard
The TSu is simple to operate, has small footprint, and offers flexiblity of operation. In addition with sample cells from 1ml to 8ml, a range of materials can be tested including powders.
A low temperature version is also produced allowing screening starting well below room temperature.
The principle operation is a simple oven temperature ramp (0.5-10° C/min), with sample temperature and pressure allowed to vary independently. Exotherm and gas evolutions are indicated by a spike in the sample Temperature and/or Pressure traces.
Additional operating modes are available as standard including
- Isothermal (stability)
- Soak & Scan
Several Thermal Screening Units can be used in parallel, running from the same computer. This is a cost effective method of screening large numbers of samples. The compact design of the instrument makes it easy to fit several units into a standard fume cupboard.