[Al Skierkiewicz]

C,
This looks like a simple modulation. Carrier on for ones and off for zeros. A morse code reader will not decode this. As Don pointed out, a simple AM detector/diode should give you back some form of digital signal. Then you must store the data somehow to allow it to be read. If the thermometer only reads from 70 to 180 degrees then the data is likely only representing the scaled temperature. 70 is transmitted as a zero and 180 as 100 and then the scaler value is added in the receiver.