Atmospheric sensor
An atmospheric sensor was a type of sensor used to detect atmospheric phenomenon. 

The Sikarians used a type that emanated sounds and also looked like a musical instrument, but it wasn't one, as the frequencies of the chimes it emanated indicated changes in the weather conditions of Sikaris. It worked on the principle of non-linear resonance, by adjusting to the dynamic variables in the atmosphere.

In 2371, Eudana showed Harry Kim of the  how to use the atmospheric sensor. ()

Sensor technology