The Master Meter DB (Dual Body) Compound Meter is designed to provide utilities with highly accurate measurement over a wide flow range. By incorporating a Master Meter multi-jet meter and turbine meter in one assembly, the DB Compound relies on proven velocity measurement to produce high and sustained accuracy over a broad range of flows.

Design and Operation

The Master Meter compound meter combines a Master Meter turbine meter on the main flow line and appropriatelysized multi-jet meter on the low flow or bypass line. A differential pressure valve controls the flow of water through the appropriate measuring device. Piping sized to the bypass line connects the meters in a single assembly.

Water flows through a bypass meter, and usage is recorded on its register, until the flow rate reaches approximately one half the capacity of the bypass meter. At that point, the drop in pressure causes the differential pressure valve to open, and water flows through both the main line and bypass meters. In its full open position, the valve allows unimpeded flow through both chambers and registration is recorded on both meters. When flow is decreasing the process is reversed, directing low flows through the multi-jet chamber.

Broad Flow Range

The Master Meter DB Compound Meter provides utilities accurate measurement over a significantly broader flow than specified in AWWA C-702, in the chart above, and beyond available with many other compound designs. In addition, Master Meter guarantees the accuracy of its meters in these broader flow ranges.