Sealed containers the SF6 gas density meter is mainly used to monitor the density of SF6 gas, can be widely applied to SF6 circuit breaker, switch, ring network cabinet, transformer and transformer, and suitable for outdoor harsh environmental conditions. Can also be applied to measure the similar SF6 gas in the substation and power grid system for high-voltage insulating medium, medium voltage SF6 load switch, voltage ark electrical equipment such as gas pressure monitoring, the product has good sealing and accuracy, and widely by a great number of the pearl river delta, Yangtze river delta region of many electric power equipment and power grid companies to use force, and the installation size can be matched with ABB switchgear.