How the CorTempTM Sensor Works
The ingestible 'thermometer pill' has a silicone-coated exterior, with a microbattery, a quartz crystal temperature sensor, a space-aged telemetry system, and microminiaturized circuitry on the interior.
Once the pill is swallowed, the quartz sensor vibrates at a frequency relative to the body's temperature, transmitting a harmless, low-frequency signal through the body. A recorder outside of the body can read this signal and display a core body temperature and other vital statistics. After 18 to 30 hours, the pill passes safely from the digestive system.