Service: Compatible gases or liquids. Wetted Materials: Body: SS; O-rings: Buna-N; Sight tube: Polysulfone. Temperature Limits: See “Operating Limits” table. Pressure Limits: See “Operating Limits” table. Accuracy: ±2% of FS. Repeatability: ±0.25% of indicated flow rate. Process Connections: 3/4? and 1-1/2? female NPT. Scale Length: 3.2? (8 cm) for 3/4? NPT connection, 5.2? (13 cm) for 1-1/2? NPT connection. Weight: 4 lb (1.8 kg) for 3/4?, and 12 lb (5.5 kg) for 1-1/2?.