Breath analyzer device

摘要

A breath analyzer device (1) having an inlet region (2) and a sensor arrangement (3), wherein the inlet region (2) is configured to receive a breath sample from a test subject and direct the sample to the sensor arrangement (3), and the sensor arrangement is configured to provide a signal representative of the concentration of a volatile substance within the sample. The inlet region (2) includes a heater (20, 24) arranged between: a sample inlet port (6) which is open to atmospheric air outside the device (1); and a sample outlet port (11) which is open to the sensor arrangement (3), the heater (20, 24) extending at least part way along a tortuous flow channel (18) which extends between the inlet port (6) and the outlet port (11) for the direction of the sample to the sensor arrangement (3).

主权项

1. A breath analyzer device configured to receive a breath sample from a test subject and direct the sample to a sensor arrangement, the sensor arrangement of a type configured to provide a signal representative of the concentration of a volatile substance within the sample, the breath analyzer device comprising an inlet region that includes a heater arranged between: a sample inlet port which is open to atmospheric air outside the device; and a sample outlet port, which is open to the sensor arrangement, the heater extending at least part way along a tortuous flow channel which extends between the inlet port and the outlet port for the direction of the sample to the sensor arrangement; wherein the heater is integral with a wall defining the tortuous flow channel; wherein the wall is provided as a length of tape which is wound upon itself to form a coil having a plurality of spaced-apart turns between which the tortuous flow channel is defined; wherein the wound tape is provided inside a housing forming at least part of the inlet region; wherein the housing has a pair of spaced-apart end-walls between which the wound tape is provided, the sample inlet port being formed as an aperture through one of the end-walls, and the sample outlet port being formed as an aperture through the other of the end-walls.