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What happens to a logger when there is a power failure?

The chips used to transmit the data use a good amount of power. In the event of a power outage the Ethernet or WiFi chip is turned off to conserve battery life, but the logger will still record the temperature and humidity data.

How long the device can record for on batteries depends on how full the batteries are and the conditions the device is being used in. With a fully charged batteries , our first gen devices will log for two days. 

For second generation devices, our touchscreen battery lasts approx 70 hours and has more than enough memory to store any data during that period. Our digital logger records data for up to seven days.