The so-called confined space refers to the space that is closed or partially closed, relatively isolated from the outside, with narrow access, operators can not work inside for a long time, and natural ventilation is poor, which is easy to cause the accumulation of toxic, harmful, flammable and explosive substances or insufficient oxygen content.

    When the internal structure of a limited space is complex and dangerous, it is not easy for people to escape or rescue. The characteristics of limited space also lead to internal oxygen deficiency, or fermentation to produce ammonia, hydrogen sulfide and flammable and explosive gases. Therefore, when entering the confined space or working inside, the staff shall be equipped with relevant gas alarm or the construction unit shall install fixed online alarm inside the confined space.

    The GY4-O2, GY4-CO, GY4-H2S, GY4-NH 3, GYC1201 combustible gas sensors launched by Guangyuan Technology, which are imported technology and completed with imported materials, have excellent long-term stability and are the cost-effective choice of instrument manufacturers. It is everyone's responsibility in the instrument and meter industry chain to reduce or avoid injuries to staff during construction.