The Series RM Rate-Master Flowmeters are a line of general use, direct reading precision flowmeters suitable for both gas and liquid applications. This Series consists of 2 Inch [51 Millimeter], 5 Inch [127 Millimeter] and 10 Inch [254 Millimeter] scales that can be panel or surface mounted with optional precision metering valves. Within a given Series, the Rate-Master flowmeter bodies can be instantly interchanged, allowing the piping to remain undisturbed, interchangeability of the ranges, and easy cleaning. The Rate-Master flowmeter bodies can be instantly interchanged within the same series scale size, allowing the piping to remain undisturbed, interchangeability of the ranges, and easy cleaning.