Cost effective and clean looking, series AR regulators offer various pressure range settings to accommodate most applications. The locking adjustment knob prevents accidental setting changes. The modular design of the AR series connects with other SMC air preparation equipment.Modular type regulator, Optional embedded pressure gauge , Available with built-in backflow mechanism , Knob is

Refer to the AR-A/AR-B/AR-D series catalog excerpt, which has been reproduced below.
The part number of the standard AR20 to AR60 round type pressure gauge is “G36-10-01,” or “G46-10-01”(for the R thread type).
For example, the part number of the AR30-03BG-A pressure gauge is “G36-10-01.”

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 01 (1/8), Option: H (Set Nut for Panel Mount), Semi-Standard 1: 2 (Metal Bowl), Semi-Standard 2: Standard

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 01 (1/8), Option: H (Set Nut for Panel Mount), Semi-Standard 1: 6C (w/Bowl Guard, Nylon Bowl), Semi-Standard 2: Standard

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 01 (1/8), Option: H (Set Nut for Panel Mount), Semi-Standard 1: CN (C + N), Semi-Standard 2: Standard

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 01 (1/8), Option: H (Set Nut for Panel Mount), Semi-Standard 1: 1 (0.02 to 0.2MPa Setting), Semi-Standard 2: Standard

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 01 (1/8), Option: H (Set Nut for Panel Mount), Semi-Standard 1: 1N (1 + N), Semi-Standard 2: Standard

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 01 (1/8), Option: H (Set Nut for Panel Mount), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Standard

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 1/8, Option: Set Nut for Panel Mount, Semi-Standard 1: Metal Bowl, Semi-Standard 2: Standard, Made to Order: -

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 1/8, Option: Set Nut for Panel Mount, Semi-Standard 1: w/Bowl Guard, Nylon Bowl, Semi-Standard 2: Standard, Made to Order: -

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 1/8, Option: Set Nut for Panel Mount, Semi-Standard 1: C + N, Semi-Standard 2: Standard, Made to Order: -

Body Size: 20, Thread: Rc: Size 20, 25, 30, 40; M5: Size 10, Port Size: 1/8, Option: Set Nut for Panel Mount, Semi-Standard 1: 0.02 to 0.2MPa Setting, Semi-Standard 2: Standard, Made to Order: -

Regulator Unit Combination: Filter Regulator, Port Size: Rc1/8, Filter Rating: 5μm, Compressed Air Quality: General Dry Air, Maximum Operating Pressure(MPa): 1, Case Material: [Resin] Polycarbonate Case, Case Guard: No, Exhaust Structure: Non-relief type, Flow Direction: [Standard Flow (Left to Right)] Left to right, Drain Cock: [Not Provided] No, Pressure Gauge: No (No Pressure Port Plug

Regulator Unit Combination: Filter Regulator, Port Size: Rc1/8, Filter Rating: 5μm, Compressed Air Quality: General Dry Air, Maximum Operating Pressure(MPa): 1, Case Material: [Resin] Polycarbonate Case, Case Guard: Presence, Exhaust Structure: Relief type, Flow Direction: [Standard Flow (Left to Right)] Left to right, Drain Cock: [Not Provided] No, Pressure Gauge: No (No Pressure Port Plug

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: H (w/Set Nut, for Panel Mount), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: R (Right to Left), Knob: Downward, Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: EH (E+H), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Y (Upward), Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: E (Square Embedded Type Pressure Gauge, w/Limit Indicator), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Y (Upward), Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)

Body Size: 20, Backflow: w/o Backflow Function, Thread: Rc, Port Size: 01 (1/8), Options: E3 (Output: PNP; Electrical Entry: Wiring Bottom Entry), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Y (Upward), Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

Body Size: 20, Backflow: w/o Backflow Function, Thread: F (G), Port Size: 02 (1/4), Options: H (w/Set Nut, for Panel Mount), Set Pressure: 1 (0.02 to 0.2 MPa Setting), Exhaust Mechanism: Relieving Type, Flow Direction: R (Right to Left), Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

Body Size: 20, Backflow: w/o Backflow Function, Thread: N (NPT), Port Size: 01 (1/8), Options: BE (B+E), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Y (Upward), Pressure Units: Z (Unit on Product Label: psi, Pressure Gauge: MPa/psi Dual Scale)