Schmidt Technology presents maintenance-free flow sensors suited for temperatures up to 350 °C. The SS 20.650 features special connecting elements and a sensor element made of high temperature resistant ceramic material. The chamber head, also made of high-temperature resistant ceramic material, protects the sensor element against mechanical strain or high pressures. The SS 20.650 sensor's ability to measure the operating volume flow without using auxiliary variables and calculations and its high dynamic measuring range from 0,2 Nm/s to 60 Nm/s extends the application range and ensures high long-term stability without risk of drift and without requiring maintenance.