Our Flexi1 is a versatile battery powered device that can interface to a range of sensors, and send the data via cellular (2G, 3G, 4G), CDMA, LoraWan, SigFox, Wifi and other communications cards. Flexi1 web page
Here is a Flexi1 in South Korea monitoring tank levels using an ultra-sonic sensor:
Here is a Flexi1 installed on a “safety shower” on a mine site in Western Australia. It is measuring the ambient temperature and the temperature of the water in the safety shower.
Graphs of the temperatures: