DPI-01 portable laser micro-moisture meter is a portable instrument developed by our company. It is used to detect micro-moisture content in SF6 gas. The instrument uses spectral absorption method to detect micro-moisture content in SF6 gas. Owing to special design of replaceable gas circuit, it detects micro-moisture without discharging SF6 gas. The instrument is applicable in daily maintenance and examination of electric equipment and calibration of dew point sensor. It is especially suitable for power system and provides convenience for production and safe operation of SF6 electric products.