In engines, where there is a high probability of contamination, Pitot tubes are very ideal for pressure measurement owing to their simplicity and lean construction. Further, their usage does not lead to a pressure drops. Therefore, you find pitot-tube pressure sensors before and after the compressor and in the exhaust gas recirculation (ECR) circuit.truckflow from systec Controls is the product you are looking for, if you need reliable and top-notch pitot tubes for your engines. systec Controls are the world leaders for over 15 years in manufacturing averaging pitot tubes for industrial applications. Our products have proven their worth even in the harshest flow conditions.