1. the conditions of the process to be used, which include: process temperature, process pressure, and the required range.
2. The characteristics of the material to be measured, whether the media form is solid or liquid. Solids need to know the size of the material particles, and dust size.
The liquid needs to know whether it the viscous whether there is a volatile and crystalline phenomenon, whether adhesion, and whether the surface of the material fluctuations. Whether there is foam.
3. Measurement requirements: This refers to the requirements for accuracy.
4. Inlet and outlet characteristics: the speed and manner of the inlet and outlet.
5. Silo environment: whether there are disturbing objects such as beams and pipes, whether there are agitators and heating coils.