| Digital Concrete Air-Meter (DY-300) : Air content in fresh concrete is commonly measured in the field using the pressure method. The pressure method is practical for field-testing most concretes. Original volume of Air in the sample is determined by the principle of Boyle is Law.This Meter(DY-300) quickly determine percentage of entrained air in freshly mixed concrete. And has a multi-range feature to accurately measure entrained air up to 9.9% by Digital Measuring System. 1.Technology: Digital Measuring System -Measuring Target: Air content in freshly mixed concrete -Measuring Method: Digital Measuring System by Micom(Water filled/Waterless) -The principle of Measurement: Boyle is Law -Air pressure sensor: Ceramic pressure cell, Max.200.0kPa | 
