SMC PF2M711S-N2-A-MS Digital Flow Switch MSRP: Now: $297.00 Was: PF2M7 is a digital flow sensor compatible with air, nitrogen, argon or carbon dioxide. PF2M7 refreshes the legacy PFM7 with several enhancements. The thermal sensor is protected in a bypass flow... PF2M711S-N2-A-MS