The Durable Brass Concrete Air Meter Calibrator checks the accuracy of any pressure-type concrete air meter. This model is constructed from machined brass for greater durability. The Calibration Canister is placed 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.
7.5x2.125in (191x54mm), height x diameter with 0.5in (13mm) thick stabilizing base.
Meets Test Methods:
ASTM C 231