Body Size: 30, Backflow: w/o Backflow Function, Thread: Rc, Port Size: 3/8, Options: B+G, Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: Relieving Type, Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: Non-relieving, Option 2: -

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: None, Option 2: R+Y

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: None, Option 2: Upward Handle

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: None, Option 2: Flow Direction: Right->Left

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: 0.02~0.2MPa Setting, Option 2: -

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: 0.02~0.2MPa Setting+Non-relieving, Option 2: -

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: 0.02~0.2MPa Setting+Non-relieving, Option 2: Flow Direction: Right->Left

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: 0.02~0.2MPa Setting, Option 2: Flow Direction: Right->Left

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: 0.02~0.2MPa Setting, Option 2: Upward Handle

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: M Thread, Rc(PT), Port Size: 3/8, Accessory: B+G, Option 1: Non-relieving, Option 2: Flow Direction: Right->Left

Size: 3/8, Reverse Flow: Regulator, Standard, Thread: Rc(PT), Port Size: 3/8, Accessory: B+Gauge, Option 1: None, Option 2: None, Made to Order: For High Pressure

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

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

This is a legacy product, and replaced byAW30-03BG-B, FILTER REGULATOR, MODULAR, AIRLINE EQUIPMENT, AW MASS PRO, EA, AW MASS PRO 3/8 MODULAR (PT), 1.30218 lb

This is a legacy product, and replaced byAW40-03BG-B AW MASS PRO. FILTER REGULATOR, MODULAR. AIRLINE EQUIPMENT. AW MASS PRO 3/8 MODULAR (PT). 2.19203 lb. EA.

This is a legacy product, and replaced byAW30K-03BG-B-YB, FILTER REGULATOR, MODULAR, AIRLINE EQUIPMENT, AW MASS PRO, EA, AW MASS PRO 3/8 MODULAR (PT), 1.37001 lb

Body Size: 30, Backflow: w/o Backflow Function, Thread: Rc, Port Size: 03 (3/8), Options: BG (B+G), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: N (Non-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: 30, Backflow: w/o Backflow Function, Thread: Rc, Port Size: 03 (3/8), Options: BG (B+G), Set Pressure: 0.05 to 0.85 MPa Setting, Exhaust Mechanism: N (Non-relieving Type), Flow Direction: Left to Right, Knob: Downward, Pressure Units: Unit on Product Label: MPa, Pressure Gauge in SI Units: MPa

Body Size: 30, Thread: Rc (Rc: for Sizes 20, 25, 30, 40; M5: for Size 10), Port Size: 03 (3/8), Option: BG (B + G), Semi-Standard: NR (N + R)