SMC – PFA721‑F03‑67N‑Q – Digital Flow Switch (Air/N₂), 20–200 L/min, 3/8” G Port

Main Features

• Manufacturer: SMC Pneumatics

• Model/MPN: PFA721‑F03‑67N‑Q (alternative label: PF2A721‑F03‑67N‑Q)  

• Device Type: Digital flow switch/sensor with integrated display and switching outputs

• Measured Media: Dry air or nitrogen  

• Flow Range: 20–200 L/min (switch threshold optional down to 10 L/min); full range 10–210 L/min  

• Port Connection: 3/8” BSP (G) full-thread port  

• Voltage & Outputs: 12–24 V DC supply; two PNP open-collector outputs, up to 40 mA each

• Display: 3-digit LED display, two color modes (e.g. green/red – normal/alarm) with unit toggle  

• Accuracy & Response: ±5% FS accuracy; repeatability ±1–2%; response ≤1 s  

• Materials & Protection: IP65 rating; metal body; 1 MPa proof pressure  

• Certifications & Standards: CE marked; RoHS compliant; suitable for pneumatic system monitoring  

• Typical Applications:

  • Compressed air flow monitoring/control

  • Leak detection in pneumatic systems

  • Process air flow logic and safety interlocks