The series of analog signal isolators can sample 2-wire current signal or 4-wire current source signal, and output it as 4-wire current signal after isolation. They are suitable for applications where power is difficult to use. This series of products have the characteristics of high-precision measurement and millisecond-level fast response, and the linear correction function further increases the convenience and efficiency of the application. The series of analog signal isolators are widely used in major projects in oil field, petrochemical, manufacturing, electric power, metallurgy, cement, medicine, environmental protection and other industries.