一种用于检测流体流量的计量装置，包括主流量管和旁路组件，所述旁路总成具有至少一个流入管路和至少一个来自主流管的下流分接头。 在主流管中设置流量限制装置，这减少了主流管的流通横截面。 第一流量传感器和第二流量传感器耦合到旁路装置并且耦合到评估电路。 第一和被构造和联接到所述旁路布置所述第二流量传感器是具有彼此不同的传递函数的传感器的流体的流动转换成的传感器信号，从而使传感器提供在通过主流动管的流体的相同的流动不同的传感器信号，其中，所述传递函数 是非线性函数并且彼此不成比例。 其中，所述评估电路被配置成检测所述流量传感器的信号电平，并确定通过该测定装置的流体流动，并且还执行信号值的基础上的真实性检查，以检测传感器，或两个传感器中的一个的故障。

A measuring device for detecting a fluid flow with a main flow pipe and a bypass arrangement which has at least one influx and at least one tap-tap effluent from the main flow tube. In the main flow pipe flow limiting means are arranged, which reduce the flow cross section of the main flow tube. A first and a second flow sensor coupled to the bypass arrangement and coupled to an evaluation circuit. The first and the second flow sensor are constructed and coupled to the bypass arrangement is that the sensors having mutually different transfer functions to convert a flow of fluid in a sensor signal, so that the sensors provide different sensor signals at an identical flow of fluid through the main flow pipe, wherein the transfer functions are each non-linear functions, and are not proportional to each other. Wherein the evaluation circuit is configured to detect signal levels of the flow sensors and to determine a fluid flow through the measuring apparatus and also to perform a plausibility check on the basis of signal values ​​to detect a malfunction of one of the sensors, or both sensors.