Combine a Yocto-CO2 with a YoctoHub-GSM-3G-EU to get an autonomous appliance with built-in network connectivity:
The Yocto-CO2 device will let you measure the quantity of carbon dioxide (CO2) in ambiant air via an USB connection, as well as record it on its internal flash for later retrieval when connected again.
This device is ideal to precisely monitor the air quality in residential, commercial and industrial spaces, as well as potentially dusty air ducts used in HVAC (Heating Ventilation and Air Conditioning) systems. The sensor used in this device uses non-dispersive infra-red absorption (NDIR), and requires no maintenance. It provide precise measurements already within the first minute after power on.
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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.
Android™ app Valarm Pro v1.2 now includes support for the Yocto-CO2 sensor! Monitoring CO2, whether you’re using it for agricultural or ornamental purposes, or producing it due to industrial or food production activities, or simply living and working in enclosed spaces of any kind – can be critical for human health, productivity, and creativity. With Valarm you can monitor CO2 in real-time, record data to visualize trends, and trigger alerts at configurable levels.
Check out http://www.valarm.net/blog/valarm-pro-update-monitors-co2-and-vocs/ for additional information.