AS21P consists of three parts: multi-function Controller, adjustable micro-absorption stand and semiconductor constant-temperature absorption stand, which can be divided into two independent functional units: Semiconductor constant-temperature device and automatic injection device.

The automatic sampling device is used to rapidly suck the solution into the pool for testing and analysis, and then it can be discharged quickly. Therefore, it can be widely used in biochemistry, medical health, clinical examination, life science, petrochemical industry, environmental protection and so on.