The 250 series is a 4 chamber diaphram type gas meter. Its compact size, light weight, long life, high accuracy and maintenance-free operation make it a perfect choice for retrofit or new applications. This meter is ideally suited to light commercial or larger residential use. Meters are equipped with pulse output for interfacing with interval data recorders. The 250 is for use with loads ranging from 200 to 250 CuFt/Hr.