INTEGRATING AIR FLOW COUNTER FOR HIGH VOLUME AIR SAMPLER

Abstract

The static pressure of the air at the outlet of high volume air sampler was picked up by the transducer.
The strain of thin plate of phosphorbronze stretched in the cylindrical vessel was transformed into electrical potential by the differential transformer.
The strain of thin plate of phosphorbronze stretched in the cylindrical vessel was transformed into electrical potential by the differential transformer.
The continuous value of the electrical potential was transformed to the digital value by the integrated circuit, and this digital pulse was counted for measuring the air volume.
Additionally, the instantaneous value of the air flow can be indicated by the meter.