Combine a Yocto-Thermistor-C with a YoctoHub-GSM-3G-EU to get an autonomous appliance with built-in network connectivity:
The Yocto-Thermistor-C is an USB interface for NTC and PTC thermistor. It can measure up to six temperature points. Each of the six channels can be configured independently thanks to tables or reference temperatures and β coefficients. The Yocto-Thermistor-C is an insulated device: there is an electric insulation between the sensor part and the USB part.
The Yocto-Thermistor-C is shipped with six tiny NTC thermistors connected to a 10 centimeter wire. You can extend them with any regular electric wire.
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The YoctoHub-GSM-3G-EU is a wireless-enabled module that can host three Yoctopuce modules to access them remotely through a 3G GSM cellular network (UMTS and HSPA). It can be powered either by a USB Micro-B cable and a regular phone charger, or a 5V battery pack.
The radio module supports the two GSM frequency bands 900 MHz and 1800 MHz used in Europa, Middle-East, Africa, Asia and Pacific. For a detailed list of frequency bands supported in each country, please refer to the Wikipedia page GSM_frequency_bands.