Service:Compatible gases or liquids.Wetted Materials:Flowtube: Borosilicate glass; Float: 316 SS (black glass as indicated); Float stops: PTFE; End fittings: Anodized aluminum or 316 SS; O-rings: Buna-N on aluminum models and fluoroelastomer on SS models.Temperature Limits:250°F (121°C).Pressure Limits:250 psig (17 bar).Accuracy:±5% FS @ 70°F (21.1°C) and 14.7 psia (1 atm absolute).Repeatability:±0.25% of scale reading.Scales:Direct reading 65 mm or 150 mm scales for air or water.Turn-down ratio:10:1.Connection:1/8″ female NPT.Mounting:Vertical.Valve:6-turn needle (standard on models with valve).