The Plastic Concrete Air Meter Calibrator checks the accuracy of any pressure-type concrete air meter. Set the specially designed canister upright at the bottom of the water-filled base, and the meter should read 5% air by volume. Two calibrators will check 10% air reading. The Plastic Concrete Air Meter Calibrator can be used with any 1/4 cu ft air entrainment pressure meter.
Dimensions: 3.75 x 4in (95x102mm), height x diameter.
Meets Test Methods:
ASTM C 231