Type 4 Strip

ISO 11140-1 Type 4 Multi-Critical Process Variable Indicator for monitoring Ethylene Oxide (EO) processes. The indicator strips are intended for use with individual materials (i.e. packs, containers) to demonstrate that the material has been exposed to an EO process to distinguish between processed and unprocessed items. Multi-critical process variable indicators react to all critical process variables (time, temperature, relative humidity and EO gas concentration). The backing of the strip is removable which exposes latex-free adhesive for easy application of the strip to packages during exposure and /or for record keeping purposes after exposure. Indicator can be used as a strip, label or both. True Indicating multi-critical process variable indicator strips contain no lead or other toxic heavy metals. Distinct color transition from violet to green.