A pasteurizer is a device used to heat liquids, such as milk or juice, to a specific temperature for a set period. This process, known as pasteurization, kills harmful bacteria and extends the shelf life of the product without significantly affecting its taste or nutritional value. There are different types of pasteurizers, including batch pasteurizers and continuous pasteurizers. Batch pasteurizers heat a large volume of liquid at once, while continuous pasteurizers process liquids in a steady flow. Both methods are essential in the food and beverage industry to ensure safety and quality.