Parker/Page (www.pageintl.com) sight flow indicators monitor flow of ultra pure liquids and harsh chemicals. They are used in vertical or horizontal lines to visually inspect for contaminants, flow interruptions, and leak detection. Manufactured from chemically-inert fluoropolymer tubing, sight-flow indicators withstand corrosive applications and high temperatures, conditions that would cause many other indicators to fail. These low refractive index polymers offer high visibility as well as superior strength-to-weight ratio, creating an almost unbreakable site glass.

Parker/Page, Fort Worth, Tex., sight-flow indicators are versatile and can be manufactured in FEP or PFA with a variety of flow ranges and fittings. Sanitary, flange, instrumentation, butt weld, and fluoropolymer-lined fittings are the most common but other fittings are available upon request. Sizes range from 0.5 up to 4-in.