Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Image of the additional boards that were used for electrochemical sensors and (b) the external board with additional metal oxide (MOx) sensors. The four-wire connections labeled “I2C Bus” contained both I2C communications and electrical power for the boards.
