JJF 1364-2012 "Sulfur Dioxide Gas Detector Type Evaluation Outline" is suitable for evaluating various types of sulfur dioxide gas detection instruments including sulfur dioxide gas detection alarms and sulfur dioxide gas analyzers. This outline covers a variety of detection principles, including electrochemistry, thermal conductivity, and Optical inspection. Instruments are usually composed of Sensors, amplifying circuits, and displays. According to the working state, they can be divided into discontinuous and continuous measuring instruments. According to the Sampling method, they can be divided into diffusion and suction. According to the way of use, they can be divided into portable and fixed. Stability and accuracy of the instrument under various environment conditions are ensured, providing the basis for the evaluation and selection of sulfur dioxide Gas detectors for relevant industries.