How do data loggers work?

In its most basic form, a data logger contains one or more sensors, a microprocessor, and an internal memory for storage. Some loggers are also enclosed in weatherproof casing, but more compact data loggers, like those in the Tinytag Talk 2 range, are not.

A data logger's sensors sample physical information from the environment (e.g. temperature or humidity levels) at set logging intervals. The sensors can be mounted inside the data logger itself or external probes can be used for hard-to-reach or extreme temperature areas.

The analogue signals produced by the sensors are converted to digital ones which the microprocessor stores in the data logger's internal memory. Tinytag data loggers have large, non-volatile internal memory, so data can be stored long-term and will be saved even if the device is powered off.

The digital data is then offloaded from the data logger using specialised computer software.

If the logger has USB connectivity, the data will remain stored on the logger until offloaded manually onto a computer via a USB cable.

Loggers with Radio or LAN (Ethernet) connectivity automatically transmit data to a computer. Radio loggers send information to a receiver, which then sends the data to the computer running the system. LAN loggers are directly connected to the network via an ethernet cable.

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