The A Series diaphragm meter combines accuracy and long life in a compact size. These commercial meters comprise a range of positive displacement gas measurement devices with capacities of 400 to1000 CFH and are ideally suited for light and higher capacity commercial metering requirements such as dry cleaners, restaurants, schools, hospitals and hotels. The 400A, 675A, 800A, & 1000A meters retrofit to any meter set within its capacity range. The 400A meter is shown to the right.