FLOWSIC150 CARFLOW: measuring car exhaust at 600C

Mar 21, 2013

With the FLOWSIC150 CARFLOW, SICK is offering an ultrasound exhaust flow meter for test bench applications in the field of automotive research and development for more than 10 years. Based on this experience, the device has been comprehensively overhauled in collaboration with leading automobile manufacturers in Germany and the USA. The new SICK flow meter makes it possible to measure exhaust gas flow using ultrasound up to 600 °C with its patented sensor cooling and real-time measurement.



Outstanding technology package: Ultrasound

The focus was to improve metrological properties while expanding the field of application. The optimized technology for industrial ultrasound flow measurement from SICK has been transferred to the device and its range of applications expanded — thanks to the patented sensor cooling system — to exhaust temperatures of up to 600 °C. SICK is the only market player to offer a real-time flow meter for car exhausts with an extensive measuring range and scope of application, high temperature resistance, low pressure loss, low maintenance operation, and maximum measurement accuracy, even in the case of dynamic flow conditions and very low flow rates. Customers confirm that the FLOWSIC150 CARFLOW is the only device in this market which meets the stringent requirements imposed by the area of research and development.  



Measuring disrupted flow profiles accurately

FLOWSIC150 CARFLOW FLOWSIC150 CARFLOW volume flow measuring device

The FLOWSIC150 CARFLOW, like all SICK ultrasonic flow measurement devices, measures flow according to the transit time difference method using piezoelectric ultrasound sensors. Ultrasonic signals are transmitted alternately through the exhaust flow at a certain angle. Driving and braking effects due to the exhaust flow lead to different transit times of the signals through the flow of exhaust. This difference in transit time is analyzed by the integrated electronics and converted into a flow velocity along the ultrasonic measuring path. The exhaust velocity is measured in the measurement chamber of the device on four independent ultrasonic measuring paths, whose individual results go into the measurement result in weighted form. By using this 4-path arrangement, even disrupted flow profiles that result from less-than-ideal flow from the exhaust pipe can be accurately measured.  


Flow measurement using ultrasound is ideally suited to meet the diverse requirements of exhaust gas flow measurement in test bench applications. This makes the FLOWSIC150 CARFLOW an excellent example of how sophisticated technology and many years of experience can be successfully transferred to other fields of industry.