Control switch for gas-liquid composition proportion detection

The utility model is provided with two detection electrodes for detecting the positive and negative types of the gas-liquid composition. The negative detection electrode is connected with the negative electrode of a direct current power supply, the positive electrode of the direct current power supply is connected with the control electrode of a controlled silicon, the positive detection electrode is connected with one end of a potentiometer, and the other end of the potentiometer is connected with the catelectrode of the controlled silicon. The electric voltage between the positive and the negative detection electrodes is U1, the electric voltage between the catelectrode and the control electrode of the controlled silicon is U2, the electric voltage of the direct current power supply is U, the potentiometer resistance is Rw and electric voltage is U3, the gas-liquid composition resistance is R1, and the control switch comprises the catelectrode and the anode of the controlled silicon. Through the change of the proportion of the gas-liquid composition, the controlled silicon is triggered and conducted, which realizes the automatic detection. The utility model has the advantages of less components, simple structure, stable performance and low cost price.