F-410 Acrylic Flow Meter F-410N Series Flow Meters are machined of high-quality annealed acrylic and polished to a clear finish. Scales are screen printed on the meter body with a white back reflector for easy reading. Adapters are Polypropylene reinforced with aluminum stress rings for added strength, and o-rings are FKM. Technical Overview: GPM 1 - 20 LPM 4 - 80 PSI 150 Bar 10.3 Fahrenheit (°F) 150* Celsius (°C) 65* Body Material Acrylic Pipe Sizes ¾”, 1” F/NPT