According to the regulations, when the water level meter distance operation surface is higher than 6m, should be installed low-status water level meter.
There are two kinds of low status water level meter with liquid column differential pressure type low status water level meter and mechanical low status water level meter. The differential pressure low-status water level meter of liquid column is made by using the principle of hydrostatic pressure to measure the static pressure difference of two liquid columns. According to the different proportion of liquid in the low status water level meter indicator, there is a heavy liquid low status water level meter with a specific proportion greater than L, and a light liquid low status water level meter with a specific gravity of less than 1.
There are also differential pressure type low status water level meter and so on.
The working fluid requirements for low-status water level gauges are as follows:
1, insoluble in water.
2, can be dyed into a distinct color, and water energy to form a clear dividing line.
3, the boiling point is high, and no corrosive effect. 4, viscosity should be as small as possible.