An airway tube system for exhaled breath sampling comprising: an airway adapter having an outer wall and an interior space, the outer wall having an interior surface and an exterior surface and a breath sampling port characterized by having: a breath collector extending outside of the outer wall of the airway adapter, the breath collector being substantially perpendicular to the interior surface of the airway adapter; two or more inlets (110, 122) adapted to sample breath from the airway adapter, each of the inlets extending through at least the interior surface of the outer wall and into the interior space of the airway adapter to the central axis, and being in fluid flow connection with fluid within the interior space of the airway adapter; and a channel extending between the two or more inlets and being in fluid flow connection with each of the two or more inlets, the channel being located externally to at least the interior surface of the airway adapter and being substantially perpendicular to the two or more inlets and to a wall of the breath collector, wherein the channel has no further opening than to the two or more inlets and the breath collector; wherein the two or more inlets are connected to each other at a junction located within the channel, and externally to the interior surface of the outer wall of the airway adapter; and wherein the two or more inlets each comprise a bore extending from an aperture at the end that extends into the interior space of the airway adapter to a channel opening at an opposite end of the bore, extending into the channel, wherein the length of the inlet bore is substantially larger than a diameter of the inlet bore, thereby substantially preventing liquids blocking a first of the inlets to migrate to a second of the inlets; such that the breath sampling port is configured to facilitate exhaled breath sampling substantially without altering a waveform of the exhaled breath an airway adapter having an outer wall and an interior space, the outer wall having an interior surface and an exterior surface and a breath sampling port characterized by having: a breath collector extending outside of the outer wall of the airway adapter, the breath collector being substantially perpendicular to the interior surface of the airway adapter; two or more inlets (110, 122) adapted to sample breath from the airway adapter, each of the inlets extending through at least the interior surface of the outer wall and into the interior space of the airway adapter to the central axis, and being in fluid flow connection with fluid within the interior space of the airway adapter; and a channel extending between the two or more inlets and being in fluid flow connection with each of the two or more inlets, the channel being located externally to at least the interior surface of the airway adapter and being substantially perpendicular to the two or more inlets and to a wall of the breath collector, wherein the channel has no further opening than to the two or more inlets and the breath collector; wherein the two or more inlets are connected to each other at a junction located within the channel, and externally to the interior surface of the outer wall of the airway adapter; and wherein the two or more inlets each comprise a bore extending from an aperture at the end that extends into the interior space of the airway adapter to a channel opening at an opposite end of the bore, extending into the channel, wherein the length of the inlet bore is substantially larger than a diameter of the inlet bore, thereby substantially preventing liquids blocking a first of the inlets to migrate to a second of the inlets; such that the breath sampling port is configured to facilitate exhaled breath sampling substantially without altering a waveform of the exhaled breath a breath collector extending outside of the outer wall of the airway adapter, the breath collector being substantially perpendicular to the interior surface of the airway adapter; two or more inlets (110, 122) adapted to sample breath from the airway adapter, each of the inlets extending through at least the interior surface of the outer wall and into the interior space of the airway adapter to the central axis, and being in fluid flow connection with fluid within the interior space of the airway adapter; and a channel extending between the two or more inlets and being in fluid flow connection with each of the two or more inlets, the channel being located externally to at least the interior surface of the airway adapter and being substantially perpendicular to the two or more inlets and to a wall of the breath collector, wherein the channel has no further opening than to the two or more inlets and the breath collector; wherein the two or more inlets are connected to each other at a junction located within the channel, and externally to the interior surface of the outer wall of the airway adapter; and wherein the two or more inlets each comprise a bore extending from an aperture at the end that extends into the interior space of the airway adapter to a channel opening at an opposite end of the bore, extending into the channel, wherein the length of the inlet bore is substantially larger than a diameter of the inlet bore, thereby substantially preventing liquids blocking a first of the inlets to migrate to a second of the inlets; such that the breath sampling port is configured to facilitate exhaled breath sampling substantially without altering a waveform of the exhaled breath