If your Tinytag CO2 data logger is reading 0ppm, check that it
is connected to the mains using the power supply provided with the
Please note: The Tinytag CO2 data logger is
fitted with a back-up battery that ensures that the data logger
continues to record if the unit's power supply is interrupted.
This battery does not power the CO2 sensor.
Without power to the CO2 sensor, the data logger will only record
readings of 0ppm.
Tinytag CO2 data loggers can also be powered by an alternative
power supply. For the specification of the power supply required,
please see our article on
power supply requirements for the Tinytag CO2 data logger or
your data logger's data sheet.