The triple packed Dey engley neutralizing plates are designed for use in Clean Rooms. Micromaster offers irradiated triple packed media in 90 mm plates and as 55 mm contact plates for environmental and surface monitoring. Properties of irradiated triple packed media plates: Plates are packed in stacks of five and are labeled with product name, product code, expiration date and lot number for identification. Plates are triple- packed with the inner bag containing a desiccant pouch, to minimize condensation. Plates are gamma-irradiated in the final packaging at a dosage of 10-25 kGy to ensure the highest safety level. The irradiated triple packed media plates may be stored at room temperature (20-25°C) and have a shelf life of up to 2-3 months. The last inner bag is opened in the environmentally- controlled clean area to be monitored and the plates can be removed for use. After removal of the plates, the inner bag with the desiccant should be removed from the area as soon as possible.