The 
0650 Air Entrainment Meter is used to determine the air content of fresh concrete. It consists of a flanged 7 litre capacity cylindrical vessel and cover assembly incorporating a large (90 mm dia.) pressure gauge, air pump and valves. It has a quick action clamping system. Direct pressure gauge reading to the nearest 0.1% up to 6% and 0.2% from 6 to 10%. It is not affected by changes in barometric pressure.
The meter measures up to 22% of entrained air. It is appropriate for aggregates size of maximum 63 mm. The instrument can be calibrated.
