Turck FCS Series Calorimetric Flow Sensor (FCS-K20-AP8X). Thermal flow sensor for monitoring liquid media in pipes. Features no moving parts, adjustable set point, switching and/or analog output, and robust stainless steel probe. Available with G1/2, G1/4, or M18 process connections. IP67/IP69K rated. For monitoring coolant, hydraulic oil, and water circuits in machine tools, presses, and process equipment.