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

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