TempTrackr temperature measurement

The TempTrackr kit includes four passsive (no power/battery required) wireless temperature sensors capable of reading temperatures between 0 and 120°C from a maximum interrogation distance of 177cm. The wireless sensors are powered by bursts of RF emitted by a wireless interrogator which excite SAW resonators within each sensor. A feedback signal conditioned by the temperature is then created by the resonator and fed back electromagnetically to the wireless interrogator using the same antenna set.