The STN strain gauge is widely used in the monitoring of concrete support stress, steel support stress, steel structure stress and pipeline stress in scenarios such as foundation pits, buildings, Bridges, tunnels, slopes, docks and steel structures. It can be welded or adhered to the surface of steel structures and steel structures with anti-corrosion requirements, or installed on the surface of concrete structures. The stress of the structure can be calculated through the elastic modulus of the concrete structure or steel. The built-in temperature sensor can simultaneously monitor the ambient temperature