The article is aggravatingly short on details. It looks like the MIT sensor this is based on is: http://news.mit.edu/2016/wireless-wearable-toxic-gas-detector-

The article is aggravatingly short on details. It looks like the MIT sensor this is based on is: http://news.mit.edu/2016/wireless-wearable-toxic-gas-detector-0630 http://news.mit.edu/2016/wireless-wearable-toxic-gas-detecto...