Model 2000 from Thomas Products, of Southington, Conn., is an inline flow switch made of either brass or stainless steel used to monitor liquid flow or no flow condition in coolant systems, steam cleaners, lube oil systems, etc. The model’s design utilizes an orifice rather than a sleeve design to permit a lower pressure drop and also helps to pass larger particulates. Process connections are 1/2” MNPT, pressures to 1,500 psig and flow rates from .5 gpm to 3.0 gpm provides for maximum system capabilities.