These TST Control strips are for use with autoclave systems. The TST stands for Time, Steam and Temperature. These are three critical parameter which need to be achieved to guarantee the effectiveness of the sterilisation process. These test strips are chemical indicators and gives instantaneous results. These types of control strips are easy to use and can be used by variety of staff with minimal training. It gives a visual reading of colour change and interpretation of results. You should regularly carry out these indicators in your autoclave to ensure that is working correctly and efficiently.