There’s nothing more frustrating than stepping out of the shower, blow-drying your hair, and then dealing with relentless scalp itchiness minutes later. You might blame shampoo, hard water, or even stress—but the real culprit could be the hair dryer sitting on your bathroom counter.
It’s a combo of NTC thermistors (tiny temperature sensors) and a microprocessor. The thermistor checks heat 50+ times per second, sending data to the microprocessor.