Fluid meter for detecting a flow quantity and/or a flow rate of a fluid flowing through a measuring section and method for assembling a fluid meter

A method for assembling a fluid meter for detecting at least one of a flow quantity or a flow rate of a fluid flowing through a measuring section, the method comprising:

• providing a fluid meter having at least one measuring section part forming or including the measuring section and at least one measuring device fastened to the at least one measuring section part and projecting into the measuring section through an opening in the at least one measuring section part;
• using the at least one measuring device to at least one of detect a measured value relating to at least one of the flow quantity or the flow rate or emit a measurement signal usable to detect the measured value;
• providing at least one measuring device fastening element connected to the at least one measuring device or formed on the at least one measuring device, the at least one measuring device fastening element having a receiving region;
• providing at least one measuring section fastening element fastened to the at least one measuring section part or disposed on the at least one measuring section part, the at least one measuring section fastening element having a receiving region;
• plugging the at least one measuring device fastening element onto the at least one measuring section fastening element or plugging the at least one measuring device fastening element at least sectionally into the at least one measuring section fastening element, to fasten the at least one measuring device on the at least one measuring section part;
• then plugging at least one locking element into each respective receiving region of the at least one measuring device fastening element and the at least one measuring section fastening element, forming a form-locking connection with the at least one measuring device fastening element and the at least one measuring section fastening element;
• and
• providing at least one of the at least one measuring device fastening element or the at least one measuring section fastening element with at least one elastic return element or an elastic spring arm being deformable and generating an elastic restoring force upon plugging the at least one measuring device fastening element into or onto the at least one measuring section fastening element.