Here is a smart sensor with Bluetooth that can monitor temperature and humidity and makes the data available on your smartphone. Tempo Disc is a data logger and can record 18,000 temperature, humidity and dew point data points at your defined intervals.
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You will be able to view stats such as highs, lows, and averages on your devices. The device is smart enough to fit in your freezers, greenhouse, lab, and anywhere in between. It works with iOS and Android devices.
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