Profile: Hersey Meters Co. provides water flow control products. Our products include positive displaement meters, horizontal turbine meters, vertical turbine meters, compound meters, fire meters, automatic meter reading equipment and detector checks. Our 400 series positive displacement disc meter is used for the measurement of cold water for residential & small commercial applications where water volumes are low, & low flow sensitivity is important. The model MFMII® is designed for use as a combined fire & domestic service meter where one water line serves both fire and domestic, or process needs.It can also serve as a master meter for an entire water system, for water system zones, automatic sprinkler systems & fire services, and for domestic or process water systems.