Fig. 1.
Open-source colorimeter developed in this study. (a) Photo of the colorimeter. (b) All components required for fabrication of the colorimeter.
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.