The model number of your LogTag logger is printed on the model label on the rear of the logger.
You can find the serial number for your logger in one of two places:
On the front of the logger, above the barcode
USB loggers feature a special recess at the front which contains the barcode/serial number label.
On the model label on the rear of the logger
Loggers with a traditional 3-pin interface contain the serial number on the model label on the rear of the product.
The serial number is preceded by the letters "S/N:".
You can find more about the composition of serial numbers here.
When sending diagnostics, please send both the model and serial number. With this information it is faster for us to find the information about your Logger.