No, should use our sampling line for sampling air since it has to be very thin in inner diameter.
The reason we use our own sampling line is because of the inner diameter of the line. We need it to be very thin so the breaths expire into the line won't be mixed with each other thus causing the readings inaccurate.
The sampling looks like the regular nasal oxygen tube, but its diameter is much smaller than nasal oxygen tube, while its anti-extrusion bending capacity far exceeds the normal nasal oxygen tube. If use the ordinary nasal oxygen tube for CO2 sampling, it will significantly reduce the value of reading ETCO2, and affect the respiratory rate as well. The sampling line uses the LUER connector (female), can be used with plug-type ETCO2 module C300 in conjunction with drying tube.