However, there is no clean room specification for the CRB2-Z and CRB series.
The 10-CRB1 and 21-CRB1 series catalog can be found here.

Size: 1/8, Model Combination: AF+AR, Port Size: 1/4, Size 21, Accessory: None, All Sizes, Pressure Relief Valve: Downstream Valve, Option: Metal Bowl, Flow Direction: Left to Right; Size 21, Handle Orientation: Upward Handle

This is a legacy product. Please contact us for the latest version.sales@ocaire.com

Rated Flow Range: 21 (2 to 200 L/min), Flow Adjustment Valve: S (With Flow Adjustment Valve, Straight), Port Size: N2 (NPT1/4), Output Specification: B (Out 1: PNP; Out 2: PNP), Lead Wire: W (Lead Wire w/Connector + Rubber Cover for Connector), Unit Specification: Unit Selection Function, Bracket/Panel Mount Adapter: S (Bracket, w/Flow Adjustment Valve)

Rated Flow Range: 21 (2 to 200 L/min), Flow Adjustment Valve: S (With Flow Adjustment Valve, Straight), Port Size: C8 (ø8), Output Specification: B (Out 1: PNP; Out 2: PNP), Lead Wire: W (Lead Wire w/Connector + Rubber Cover for Connector), Unit Specification: Unit Selection Function, Bracket/Panel Mount Adapter: S (Bracket, w/Flow Adjustment Valve)

Rated Flow Range: 21 (2 to 200 L/min), Flow Adjustment Valve: S (With Flow Adjustment Valve, Straight), Port Size: 02 (Rc1/4), Output Specification: B (Out 1: PNP; Out 2: PNP), Lead Wire: N (w/o Lead Wire w/Connector), Unit Specification: Unit Selection Function, Bracket/Panel Mount Adapter: S (Bracket, w/Flow Adjustment Valve)

Rated Flow Range: 21 (2 to 200 L/min), Flow Adjustment Valve: None (Straight), Port Size: N2 (NPT1/4), Output Specification: B (Out 1: PNP; Out 2: PNP), Lead Wire: W (Lead Wire w/Connector + Rubber Cover for Connector), Unit Specification: M (SI Unit Only), Bracket/Panel Mount Adapter: R (Bracket, w/o Flow Adjustment Valve)

SI Unit: QW (DeviceNet), Input Block Stations: 21 (2 Stations/M12: 2 Inputs), Input Block COM: +COM, Stations: 2 Stations, SUP/EXH Block Mounting: D (D Side 2~10 Stations), Pilot: S (Internal Pilot, Built-in Silencer), A, B Port: C6 (ø6 One-touch Fitting), Mounting Method: None, US Option: X160US (Preferred US Option for DeviceNet Type)

SI Unit: QW (DeviceNet), Input Block Stations: 21 (2 Stations/M12: 2 Inputs), Input Block COM: +COM, Stations: 5 Stations, SUP/EXH Block Mounting: U (U Side 2~10 Stations), Pilot: S (Internal Pilot, Built-in Silencer), A, B Port: C6 (ø6 One-touch Fitting), Mounting Method: None, US Option: X160US (Preferred US Option for DeviceNet Type)

SI Unit: QW (DeviceNet), Input Block Stations: 21 (2 Stations/M12: 2 Inputs), Input Block COM: +COM, Stations: 4 Stations, SUP/EXH Block Mounting: D (D Side 2~10 Stations), Pilot: S (Internal Pilot, Built-in Silencer), A, B Port: C6 (ø6 One-touch Fitting), Mounting Method: None, US Option: X160US (Preferred US Option for DeviceNet Type)

SI Unit: QW (DeviceNet), Input Block Stations: 21 (2 Stations/M12: 2 Inputs), Input Block COM: +COM, Stations: 2 Stations, SUP/EXH Block Mounting: U (U Side 2~10 Stations), Pilot: Internal Pilot, A, B Port: N7 (1/4" One-touch Fitting), Mounting Method: D (DIN Rail Mounting), US Option: X160US (Preferred US Option for DeviceNet Type)

SI Unit: QW (DeviceNet), Input Block Stations: 21 (2 Stations/M12: 2 Inputs), Input Block COM: N (-COM), Stations: 5 Stations, SUP/EXH Block Mounting: U (U Side 2~10 Stations), Pilot: Internal Pilot, A, B Port: N7 (1/4" One-touch Fitting), Mounting Method: Direct Mounting, US Option: X160US (Preferred US Option for DeviceNet Type)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: N (NPT), Port Size: 12 (1 1/4), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: None, Lead Wire: N (w/o Lead Wire w/M8 Connector), Unit Specification: F (Instantaneous Flow Rate: Gal/min; Accumulated Flow: Gal; Temp: °F)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: N (NPT), Port Size: 14 (1 1/2), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: None, Lead Wire: N (w/o Lead Wire w/M8 Connector), Unit Specification: F (Instantaneous Flow Rate: Gal/min; Accumulated Flow: Gal; Temp: °F)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: N (NPT), Port Size: 14 (1 1/2), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: T (Temperature Sensor), Lead Wire: Lead Wire w/M8 Connector, 3m, Unit Specification: F (Instantaneous Flow Rate: Gal/min; Accumulated Flow: Gal; Temp: °F)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: N (NPT), Port Size: 12 (1 1/4), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: T (Temperature Sensor), Lead Wire: Lead Wire w/M8 Connector, 3m, Unit Specification: F (Instantaneous Flow Rate: Gal/min; Accumulated Flow: Gal; Temp: °F)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: N (NPT), Port Size: 12 (1 1/4), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: T (Temperature Sensor), Lead Wire: Lead Wire w/M8 Connector, 3m, Unit Specification: G (Instantaneous Flow Rate: Gal/min; Accumulated Flow: Gal; Temp: °C)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: F (G), Port Size: 14 (1 1/2), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: T (Temperature Sensor), Lead Wire: N (w/o Lead Wire w/M8 Connector), Unit Specification: J (Instantaneous Flow Rate: L/min; Accumulated Flow: L; Temp: °F)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: F (G), Port Size: 14 (1 1/2), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: T (Temperature Sensor), Lead Wire: Lead Wire w/M8 Connector, 3m, Unit Specification: J (Instantaneous Flow Rate: L/min; Accumulated Flow: L; Temp: °F)

Rated Flow Range: 21 (50 to 250 L/min), Flow Adjustment Valve: None, Thread: N (NPT), Port Size: 14 (1 1/2), Output Specification: B (OUT1: PNP; OUT2: PNP), Temperature Sensor: T (Temperature Sensor), Lead Wire: Lead Wire w/M8 Connector, 3m, Unit Specification: M (Instantaneous Flow Rate: L/min; Accumulated Flow: L; Temp: °C)