Ordering Information Model ZR22G Separate type Zirconia Oxygen/ High Temperature Humidity Analyzer, Detector Length -150 1.5 m Wetted Material -S Stainless Steel Flange(1) -B ANSI Class 150 3 RF Reference gas -E External connection (Instrument air)(2) Gas Thread -T 1/4NPT(Female) Connection box thread -T 1/2 NPT Instruction manual -E English -A Always -A Valves /CV Check valve(3) Filter /F1 Dust Filter(4) The thickness of the flange depends on its dimensions. Piping for reference gas must be installed to supply reference gas constantly at a specified flow rate. Specify either /CV or /SV option code. Not used with the high temperature humidity analyzer.