Flow Meter For Air and Other Compressed Gases. Direct reading. Install in any position. 360 degrees rotatable guard/scale. Easier-to-read linear scale. No flow straighteners or special piping required. Relatively insensitive to shock and vibration. Good viscosity stability. Temperature up to 240 degrees F. Accuracy +/-2 percent full scale. Repeatability +/-1 percent. Special scales available. Calibrated for 1.0 S.G. Materials: 2024 - T351 Anodized aluminum body, piston and cone. Common parts are Spider Plate: T316 SS, Spring: T302 SS, Fasteners: T303 SS, Pressure Seals: Viton, Guard: Polycarbonate, Retaining Ring: T316 SS, Retaining Spring: T316 SS, Indicator and Internal Magnet: PPS / Ceramic, Guard Seal / Bumper: Buna N, Scale Support: 6063 - T6 Aluminum and End Caps: Nylon ST.