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.
Time-related response of micropressure sensor. (a) Sample testing by periodic condensed air working at 0.02 Hz. The pressure drops due to the permeability of the PDMS membrane, which in turn causes the resistance to fall. (b) A 600 s test for long-term stability.
