TST Bowie Dick tests are economical, accurate, easy to use and consistent. In addition, they save work, time and space. The product allows verification of the proper functioning of the sterilizer and therefore the reduction of any potential risk to the patient. The unique combination of advanced TST (Time, Steam and Temperature) technology and a precision calibrated barrier system assists the test in the mechanical function of the autoclave and the quality of the steam supplied, including air removal, steam penetration, time, temperature, non-condensed gases, superheated steam and wet steam. The Browne TST disposable package is the first to obtain the "Kitemark" brand from British Standards Institution. The steam penetration test on pre-vacuum steam sterilizers from 134ºC to 137ºC for up to 3.5 minutes, is for single and daily use.