capnometer

capnometer

 [kap-nom´ĕ-ter] a device for measuring the end-tidal partial pressure of carbon dioxide.

cap·nom·e·ter

(kap-nom'ĕ-tĕr) An instrument that measures the carbon dioxide concentration of exhaled air.
Synonym(s): CO2 analyzer. [G. kapnos, smoke, + metron, a measure]