Biosensor Lab PENGUIN F ood safety is always a concern, especially for anyone with a family. The Biosensor Lab: Penguin is an easy to use at home antibotic residue testing device. The Penguin uses electro-chemical and lab on a chip technology to detect the levels of residue on your food and notifies you is they are safe or not. It takes only three easy steps to use the Penguin. First, squeeze a sample of the food on to the cartridge. Second, insert the cartridge analyzer. Third and finally, the screen of the device will show you the amount of residue, what kind, and safety level.