The selection of instrument type must meet the requirements of process production. For example, whether remote transmission, automatic recording, or alarm are required; Whether the properties of the measured medium (such as the temperature, viscosity, corrosivity, dirt, flammability, and explosiveness of the measured medium) have special requirements for the instrument, and whether on-site environmental conditions (such as humidity, temperature, magnetic field strength, vibration, etc.) have requirements for the type of instrument. Therefore, selecting instrument types correctly according to process requirements is an important prerequisite for ensuring normal operation and safe production of instruments.

In addition to standard glass, other special materials such as reinforced glass and non reflective glass are also optional for glass panels. Ordinary type (standard), steam ordinary type (M), heat resistant type (H), vibration resistant type (V), steam vibration resistant type (MV), heat and vibration resistant type (HV). Oil/water prohibition treatment removes water or oil remaining in the receiving portion during manufacturing. In addition to the standard color, the shell color should be specially noted. To reduce pulsating pressure, a throttle valve is installed at the pressure inlet.