The temperature data logger uses a microprocessor, internal memory for data storage, and sensors for data collection. They are usually small battery-powered devices. Temperature data logger can be connected to a computer and use software to view and analyze the collected data, or it can be used as an independent device with a local interface or connected to the device wirelessly.

Unlike many other types of data acquisition equipment, the advantage of temperature data loggers is that they can operate independently of a computer. Data loggers come in various shapes and sizes. The series ranges from simple and economical single-channel fixed-function recorders to more powerful programmable devices capable of handling hundreds of inputs.