How hot can Clever Logger log?
Clever Logger was designed with primarily to monitor refrigeration in the medical and hospitality industries.
As such, the high end of the temperature range is 60°C. If you need a logger than can be used to measure higher temperatures, e.g. in cooking processes, then you might look at Thermochrons.
How low can Clever Logger log?
The lower temperature range is -25°C.
This is ideal for most food freezers. In general, you only want to be alerted when a freezers gets too warm, not too cold.
How accurate is Clever Logger?
In their normal range (-20°C to 40°C), the loggers are accurate to ±0.5°C. At the extremes of temperature, this accuracy dips to 1°.
This is a very standard level of accuracy for a temperature sensor.