Cubic Sensor and Instrument (四方光电股份有限公司) develops and manufactures gas sensors and analysers, including infrared CO2, particulate, methane, refrigerant and battery thermal-runaway sensors. Its range also covers household combustible gas detectors and CO alarms for gas safety monitoring. The company was founded in 2003 and is based in the Wuhan East Lake High-tech Zone. Its household combustible gas detectors hold fire product certifications 2025291801000046 and 2025291801000047 from the Tianjin Fire Research Institute of the Ministry of Emergency Management.