Supply Voltage(V): [12 to 24] 12 to 24 ±10%, Pipe Connection Direction: 2-way, Liquid contact parts material: Resin + Metal, Mounting Hole: Presence, Display: Digital, Lamp: Presence, Acquired Standards: CE, Protection Structure: IP65, Unit Specifications: SI unit fixed, Bracket: None, Lead Wire: No lead wire with M8 connector, Calibration Certificate included: N/A, Rating Flow Range(L/min): 20

Type: [Flow Switches] Flow Switch, Fluid Type: Air / Nitrogen Gas, Flow Range(l/min): 500～Less than 5000, Sensor, Monitor Structure: [Integrated Type] Display Integrated, Output Method: PNP Open Collector / Analog, Analog Output Specification: Voltage, Pipe Port Type: Female Thread, Plumbing Thread Type: [G] G, Plumbing Thread Nominal: [1/2] 1/2, Pressure Type: Standard, Pressure Resistance

Flow Adjustment Valve: None, Port Size: Ø8 (5/16") One-touch Fitting, Piping Entry Direction: Bottom, Output Specifications: PNP, Analog 1 to 5 V, Option 1: No Lead Wire, Unit Specifications: Unit Selection Function, Option 2: With Panel Mount Adapter, Calibration Certificate: -

Flow Adjustment Valve: None, Port Size: NPT1/4, Piping Entry Direction: Straight, Output Specifications: PNP, Analog 1 to 5 V, Option 1: No Lead Wire, Unit Specifications: Unit Selection Function, Option 2: With Bracket, Calibration Certificate: w/Calibration Certificate

Rated Flow Range: 10 to 1000 L/min, Thread Type: NPT, Port Size: 1/2, Output Specifications: Out 1: PNP; Out 2: Analog 1 to 5 V, Option 1: w/o Lead Wire and M8 Connector, Unit Specification: Unit Selection Function, Option 2: w/Bracket, Calibration Certificate: Yes

Rated Flow Range: 10 to 1000 L/min, Thread Type: G, Port Size: 1/2, Output Specifications: Out 1: PNP; Out 2: Analog 1 to 5 V, Option 1: w/o Lead Wire and M8 Connector, Unit Specification: Unit Selection Function, Option 2: No Bracket, Calibration Certificate: Yes

Rated Flow Range: 20 to 2000 L/min, Thread Type: NPT, Port Size: 3/4, Output Specifications: Out 1: PNP; Out 2: Analog 1 to 5 V, Option 1: w/o Lead Wire and M8 Connector, Unit Specification: Unit Selection Function, Option 2: No Bracket, Calibration Certificate: Yes

Rated Flow Range: 5 to 500 L/min, Thread Type: NPT, Port Size: 1/2, Output Specifications: Out 1: PNP; Out 2: Analog 1 to 5 V, Option 1: w/o Lead Wire and M8 Connector, Unit Specification: SI Unit Only, Option 2: w/Bracket, Calibration Certificate: -

Rated Flow Range: 102 (10 to 1000 L/min), Thread Type: F (G), Port Size: 04 (1/2), Output Specifications: E (Out 1: PNP; Out 2: Analog 1 to 5 V), Option 1: N (w/o Lead Wire and M8 Connector), Unit Specification: M (SI Unit Only), Option 2: R (w/Bracket)

Rated Flow Range: 102 (10 to 1000 L/min), Thread Type: F (G), Port Size: 04 (1/2), Output Specifications: E (Out 1: PNP; Out 2: Analog 1 to 5 V), Option 1: N (w/o Lead Wire and M8 Connector), Unit Specification: M (SI Unit Only)

The IDK series catalog can be found here.

The FG□ series element replacement procedure can be found here.

The VFS3000 series catalog can be found here.
And the VQ4000 series catalog can be found here.
Also consider VFR3000, SY9□40, and SY7□40 series valves with a rubber seal.

The RSQ and RSG series catalogs can be found here.
The RS2H series catalog can be found here. And the RSH series catalog can be found https://www.smcpneumatics.com/Part-Builder-Links_ep_2458-1.html?https://smccatalog.partbuilder.smcpneumatics.com/support/faq/en-jp/?ca_id=actuators&fa_id=10153