liquidometer                                                 Current meter

1, the level meter is also called "water level meter" or "liquid level meter". Because the water in the boiler vaporizes heating at high temperature, the loss of water and steam is large, and the water should be constantly supplemented to keep the water level in the boiler at a certain height, and the water level is too low, the boiler is in danger of explosion. In order to know the water level in the boiler at any time, the boiler is equipped with a water level gauge, and the water level gauge and the boiler constitute a communication device. Commonly used are glass level meter, pressure level meter, buoy level meter, capacitance level meter and resistance level meter. Isotope level gauges can also be used at high temperatures and pressures.

2, the current meter, also known as the current meter, is a meter used to measure the fluid speed in the pipeline. After measuring the flow rate, it is converted into the flow rate by multiplying the fluid cross section, so it is also used for indirect flow measurement. There are klystron, hole velocity meter, velocity nozzle and Wenchenli velocity meter. Its structure is simple, firm, no moving parts, long service life; Reliable measurement, strong anti-interference ability; Small size, light weight, easy to carry, small maintenance; Compared with the general electromagnetic current meter, the manufacturing cost and installation cost is low, especially suitable for rivers, streams, swamps and other field investigation flow measurement without weeds, suitable for muddy water with high turbidity, sewage and miscellaneous mass of various liquids