Timing Doses

As previously mentioned, we've been investigating ways of informing the user of how long to hold their breath (usually 10 seconds). One of the more promising solutions appeared to be Thermochromic materials.

If used to form the nozzle of the inhaler, a thermochromic material could be tuned to instantly change colour when the medicine is sprayed, revert to its original colour after 10 seconds (depending on the ambient temperature). To determine the viability of their use, we conducted an experiment: