Turck FCS-M18-AP8X Flow Sensor – Immersion Sensor with Integrated Processor, Flow sensor for gaseous media, Calorimetric principle, Adjustment via potentiometer, 3?wire DC, 19.2…28.8 VDC, NO contact, PNP output, Cable device, Cable length (L) 2 m, Status display via 2-color LED, Chrome-plated brass sensor