microsensor
noun
mi·cro·sen·sor ˈmī-krō-ˌsen-ˌsȯr 
-ˌsen(t)-sər
: a miniature sensor
Example Sentences
Recent Examples on the Web Forty NCAA Division 1 football athletes were monitored for 13, sixty minute games using a wearable microsensor under their shoulder pads. 
NOLA.com, 27 Oct. 2017
NOLA.com, 27 Oct. 2017 Word History
First Known Use
1962, in the meaning defined above