Apparently, the real world will soon have a working version of a "tricorder" available. Because the inventors want this to be considered a medical device, it still has to get EPA approval. Sooooo...patience, patients!
http://www.cnn.com/2015/02/12/tech/mci-scanadu-tricorder/index.html
http://www.cnn.com/2015/02/12/tech/mci-scanadu-tricorder/index.html