A pill thermometer is an ingestible thermometer that allows a person's core temperature to be continuously monitored. It was developed by NASA in collaboration with Johns Hopkins University for use with astronauts.^[1] Since then the pill has been used by mountain climbers,^[2] football players, cyclists,^[3] F1 drivers.^[4] and in the mining industry.

The Thermometer Pill is currently manufactured by the company, HQ Inc under the brand name CorTemp.^[5]