GAS DETECTION SENSOR

摘要

A gas detection sensor capable of being simplified in structure and detecting, with high accuracy, the concentration of inflammable gas contained in a detected gas and the concentration of oxygen gas contained in the detected gas containing the inflammable gas under the presence of H2O or O2, comprising a first detection sensor which has a diaphragm with a platinum coated film applied on a gas contact surface in contact with the detected gas and a thermocouple which is obtained by moving for fixing one end side of each of two dissimilar metals closely to the non-gas contact surface of the diaphragm and is heated by the contact reaction of the inflammable gas and a second detection sensor which has a diaphragm with a gas contact surface in contact with the detected gas and a thermocouple obtained by moving for fixing one end side of each of two dissimilar metals closely to the non-gas contact surface of the diaphragm and detects the temperature of the detected gas, whereby the detection signals of the inflammable gas can be transmitted by the heating of the sensors due to contact reaction of the inflammable gas.