Process Challenge Device for monitoring the cleaning efficacy of your washer disinfector to be used with the Cleaning Efficacy Indicator. This device is designed for the validation and the routine monitoring of the cleaning processes in washer disinfectors for surgical instruments. The Valisafe CEI a special cleaning indicator made of stainless steel, which is contaminated with a quantitative measure of test soil (blood and additives), according to ISO 15883. This product, used in conjunction with the Valisafe standard PCD, creates a realistic and repeatable challenge. The Valisafe CEI in conjunction with a Valisafe PCD is easy to use, easy to read and can be disposed of with domestic waste.