▎ 摘　　要

NOVELTY - The utility model claims an electrochemical sensor comprising the graphene modified electrode, comprising an electrolyte tank, a sensing electrode and a counter electrode in the electrolyte tank and respectively sensing electrode pin electrically connected to the sensing electrode and the counter electrode and the electrode pins; The electrochemical sensor further comprises a metal shell located outside the electrolyte tank, the metal shell and electrolyte tank is provided with a radiating passage; the metal shell is provided with a radiating hole connected with the radiating channel of electrolyte tank is equipped with capillary grid. capillary diffusion bar is set with riser vent is connected to the electrolyte tank, electrolyte tank and the capillary gate is provided with a filter, the top of the electrolyte tank is packaged with ventilating film; the sensing electrode refers to the graphene modified electrode. The utility model can improve the flexibility and service life of the electrochemical sensor.