The utility model discloses a
liquid water detection device for gas detection, which relates to the technical field of gas detection and comprises a sampling gas
pipe, a sampling gas pump, a pulse transmitting
electrode and a pulse receiving
electrode, and the pulse transmitting
electrode and the pulse receiving electrode are mounted on the sampling gas
pipe. And the pulse transmitting electrode and the pulse receiving electrode are inserted into the sampling gas
pipe. When gas sampling is carried out, the
pulse generator transmits pulse signals to the transmitting electrode, and when
liquid water does not exist in the sampling gas pipe, due to the fact that the insulativity of gas is extremely high, no
signal exists on the receiving electrode; when
liquid water exists in the sampling gas pipe, the transmitting electrode and the receiving electrode are conducted through the liquid water, the receiving electrode can receive a pulse
signal with the same property as the transmitting electrode, and after the pulse
receiver receives the
signal, the sampling gas pump is stopped to continue gas sampling, so that whether the liquid water exists or not is detected and judged. And the liquid water is prevented from being further pumped into the instrument.