Airflow management device including a slanted passage and a branching passage between two plates supported by pillars

An environment measurement apparatus comprising:

• an air flow measurement device including
• a first channel plate;
• a second channel plate arranged above the first channel plate so as to face the first channel plate;
• a pillar fixing the second channel plate with respect to the first channel plate so as to form a space of a given size between the first channel plate and the second channel plate;
• a slope formed on at least one of a surface of the first channel plate facing the second channel plate and a surface of the second channel plate facing the first channel plate;
• a slanted channel formed by the slope in the space, a cross section of the slanted channel becoming smaller toward a center portion of the air flow measurement device;
• a branching passage arranged in the center portion, the branching passage communicating with the slanted channel;
• a projection provided in the branching passage so as to partly narrow the branching passage;
• and
• an air flow sensor arranged at a position higher than a junction between the branching passage and the slanted channel such that a surface of the air flow sensor faces the space;
• and
• at least one additional sensor configured to measure an environment parameter different from an environment parameter measured by the air flow sensor.