Cooper-Atkins presents a patented Solid Product Simulator, used to simulate product temperature in changing ambient conditions. Air temperatures fluctuate when refrigerator doors are opened and closed, but the simulator remains stable and simulates the true temperature of vaccines, medications, or other temperature-sensitive pharmaceutical products. Made with a solid, durable casing that sustains high impact, the simulator is compact, easy to install, and can be placed upright or sideways in various-sized refrigerators or freezers. The patented simulator works with numerous TempTrak transmitters; a version is available that is traceable to NIST standards.