An
air velocity indicator and control device is provided for use with pneumatic distribution systems used in air seeders that pneumatically
discharge agricultural product to the ground,
seedbed, or furrow. The
air velocity indicator and control device includes a tubular housing, extending between an inlet and an outlet, and pivotally housing a deflectable plate that actuates in response to encountering an
airflow entrained with agricultural product. A magnitude of deflection of the deflectable plate, corresponding to
airflow velocity, can be displayed through an indicator
assembly. This enables a user to identify velocity variances and differentials within the air
seeder and make corrective adjustments. In some implementations, multiple
air velocity indicator and control devices are ganged together with deflectable plates that pivot in
unison with each other. The relative angle of fixation of the deflectable plates, upon the pivot pin, can be adjusted to permit
airflow tuning as needed.