The Beya Medical Steam Emulating Indicator is a test strip that is reflective of time, temperature steam quality. It is recommended to place emulating indicator in the centre of each pouch to be sterilised. Correct sterilising conditions will turn the indicator from pink to black. 135 deg c – 3.5 minutes. 121deg c – 15 minutes. It is laminated to prevent the ink coming in contact with the contents of the pouch.