Household gas meters are mainly used for gas measurement in small areas such as ordinary houses, apartments and villas. Household gas meters are usually installed indoors and are mainly direct reading type and remote transmission type, including Contact IC Card Diaphragm Gas Meter, NB-IoT Smart Gas Meter, LoRa Spread Spectrum Smart Gas Meter, Ultrasonic Domestic Gas Meter, etc. Direct reading gas meter means that the user can directly see the numbers and hands on the gas meter to read the gas consumption. Remote transmission gas meters, on the other hand, upload gas consumption information to a server through a remote transmission device, and users can check gas consumption in real time through cell phones and other terminals.