Sensor for detecting glucose of rhizome plants

A sensor for detecting glucose of rhizome plants, comprising

• a substrate and an electrode module arranged on the substrate, wherein the electrode module includes a measurement portion and a connection section connected with the measurement portion;
• a hydrophobic insulating layer disposed on the substrate to cover the measurement portion and the connection section and including an opening revealing the measurement portion;
• and
• a cover disposed on the opening to form a specimen channel between the cover and the substrate, the specimen channel including a specimen inlet formed on a circumference of the substrate and a blocking end opposite to the specimen inlet and blocked by the hydrophobic insulating layer;
• wherein the measurement portion is arranged between the specimen inlet and the blocking end, and wherein the electrode module includes a working electrode and a reference electrode opposite to the working electrode, and wherein the measurement portion of the working electrode has a first exposed region with an area of 4-6 mm2 in the specimen channel.