Metering apparatus for dispensing a predetermined quantity of liquid, having a housing which has a liquid inflow and a liquid outflow which are flow-connected by means of a flow channel, having a valve arrangement which is arranged in the flow path of the flow channel and can be adjusted between a closed position and at least one open position for the purpose of blocking or clearing the flow path to the liquid outflow, having a measuring device by means of which the flow quantity flowing through the flow channel in the direction of the liquid outflow can be measured, having a control device which has an operator control unit or is coupled in a signal-transmitting manner to an operator control unit, wherein the metering apparatus can be operated by means of the operator control unit, wherein the control device is further coupled in terms of control to the valve element and to the measuring device, wherein the control device holds the valve element in an open position or moves the valve element to an open position when the metering apparatus is operated, wherein the housing which encloses a cavity as a receiving space is formed from two shells with a housing separating plane which is substantially horizontal with respect to the vertical axis direction, wherein the two-part housing has an upper housing shell and a lower housing shell which are connected to one another in the assembled state, characterized in that the flow channel runs in one of the housing shells (15, 16) and is formed from multiple parts at least in regions with a first wall section which is open at the top in the direction of the other housing shell and can be closed, in particular can be closed in a sealing manner, for the purpose of forming a closed flow path with a removable, cover-like second wall section, and in that the cover-like second wall section is in the form of a technical cover on which at least one part of the measuring device and at least one part of the valve element can be mounted and/or can be arranged in such a way that at least one part of the measuring device and of the valve element is arranged in the flow path. having a housing which has a liquid inflow and a liquid outflow which are flow-connected by means of a flow channel, having a valve arrangement which is arranged in the flow path of the flow channel and can be adjusted between a closed position and at least one open position for the purpose of blocking or clearing the flow path to the liquid outflow, having a measuring device by means of which the flow quantity flowing through the flow channel in the direction of the liquid outflow can be measured, having a control device which has an operator control unit or is coupled in a signal-transmitting manner to an operator control unit, wherein the metering apparatus can be operated by means of the operator control unit, wherein the control device is further coupled in terms of control to the valve element and to the measuring device, wherein the control device holds the valve element in an open position or moves the valve element to an open position when the metering apparatus is operated, wherein the housing which encloses a cavity as a receiving space is formed from two shells with a housing separating plane which is substantially horizontal with respect to the vertical axis direction, wherein the two-part housing has an upper housing shell and a lower housing shell which are connected to one another in the assembled state, characterized in that the flow channel runs in one of the housing shells (15, 16) and is formed from multiple parts at least in regions with a first wall section which is open at the top in the direction of the other housing shell and can be closed, in particular can be closed in a sealing manner, for the purpose of forming a closed flow path with a removable, cover-like second wall section, and in that the cover-like second wall section is in the form of a technical cover on which at least one part of the measuring device and at least one part of the valve element can be mounted and/or can be arranged in such a way that at least one part of the measuring device and of the valve element is arranged in the flow path.