A sensing system comprising: an electrochemical gas sensor, the electrochemical gas sensor comprising a reference terminal connected to a reference electrode and a sensing terminal connected to a sensing electrode, the sensing electrode configured to react with a target gas to generate a current; and a measurement and control circuitry; characterised in that the sensing system further comprises: an electronic circuit, the electronic circuit comprising: a first switching element electrically coupled to the reference terminal of the electrochemical gas sensor and a ground voltage terminal; and a second switching element electrically coupled to the sensing terminal of the electrochemical gas sensor and the ground voltage terminal, wherein, in an instance in which the electrochemical gas sensor is powered OFF, the first switching element and the second switching element are configured to electrically couple the reference terminal and the sensing terminal to the ground voltage terminal such that the current generated when the sensing electrode and the target gas react while the electrochemical gas sensor is powered OFF flows to the ground voltage terminal and a potential at the reference terminal and the potential at the sensing terminal remain equal. an electrochemical gas sensor, the electrochemical gas sensor comprising a reference terminal connected to a reference electrode and a sensing terminal connected to a sensing electrode, the sensing electrode configured to react with a target gas to generate a current; and a measurement and control circuitry; characterised in that the sensing system further comprises: an electronic circuit, the electronic circuit comprising: a first switching element electrically coupled to the reference terminal of the electrochemical gas sensor and a ground voltage terminal; and a second switching element electrically coupled to the sensing terminal of the electrochemical gas sensor and the ground voltage terminal, wherein, in an instance in which the electrochemical gas sensor is powered OFF, the first switching element and the second switching element are configured to electrically couple the reference terminal and the sensing terminal to the ground voltage terminal such that the current generated when the sensing electrode and the target gas react while the electrochemical gas sensor is powered OFF flows to the ground voltage terminal and a potential at the reference terminal and the potential at the sensing terminal remain equal. a first switching element electrically coupled to the reference terminal of the electrochemical gas sensor and a ground voltage terminal; and a second switching element electrically coupled to the sensing terminal of the electrochemical gas sensor and the ground voltage terminal, wherein, in an instance in which the electrochemical gas sensor is powered OFF, the first switching element and the second switching element are configured to electrically couple the reference terminal and the sensing terminal to the ground voltage terminal such that the current generated when the sensing electrode and the target gas react while the electrochemical gas sensor is powered OFF flows to the ground voltage terminal and a potential at the reference terminal and the potential at the sensing terminal remain equal.