additional details with respect to the microbridge sensors themselves may be incorporated by reference from these cited documents for the purposes of the present application it should suffice to say that if the dynamic flow sensor 21 for example comprises a pair of thin film sensors symmetrically flanking a thin film heater the sensor can be used to sense flow in either direction and this further allows the flowmeter system of the present invention to be constructed as reversible with respect to the conduit system should such a configuration be desired in any event the system is reversible with respect to the mode of measurement of the microbridge system itself connection to the heater and sensors is also conventional and available from the incorporated references thus for sensing dynamic flow the sensor 21 is directly exposed to the stream of fluid flowing past it in the conduit by designing in adequate upstream particulate matter deflection protection and turbulent flow protection the full sensitivity of the microbridge system may be directly utilized the use of deflection protection channel transition modification in addition to the particulate trapping system the screen and honeycomb allow the pen sensor to be used and very accurate flow measurements made available to the metering or instrument system with little danger for damage to the sensitive microbridge unit itself of course however the accuracy of measurement.