Flow volume detector

A flow volume detector which measures the flow volume of a dialysate in an artificial dialysis apparatus, the flow volume detector comprising:

• a base,
• a plurality of flow channels formed in the base;
• a lid plate fixed to an upper face of the base;
• and
• detecting sections arranged in the flow channels for detecting flow volumes of fluids flowing in the plurality of flow channels,
• wherein a blocking section for blocking heat conduction between the plurality of flow channels is provided between the plurality of flow channels,
• the blocking section is configured of a space including at least a groove formed in the base, the groove penetrates from a front face of the base toward a back face of the base, and
• wherein the flow channels comprise passages of connection pipes protruding from both end faces of the base, concave parts which are formed in both end parts of the base and are in communication with the passages of the connection pipes, groove parts formed at locations near to the center of the base in the concave parts, and measurement flow generating sections formed in an upper face of the base, wherein the groove parts are shallower than the concave parts and are arranged in positions higher than the passages, and the measurement flow generating sections are arranged in positions higher than the groove parts.