A temperature data logger is a device used to record temperature readings over time. It consists of a sensor that measures the temperature and a memory module that stores the readings. The device can be set up to record readings at specified intervals, such as every minute or every hour, and can store hundreds or thousands of readings. Temperature data loggers are commonly used in a variety of industries, including food and beverage, pharmaceuticals, and environmental monitoring. They are used to ensure that products are stored at the correct temperature and to identify any temperature fluctuations that could compromise product quality.