The requirements of the magnetic flap level gauge on the viscosity of the medium

What are the requirements of the magnetic flap level gauge for the measurement of the viscosity of the medium? The magnetic flap liquid level gauge adopts the principle of communicating device, which is simple and easy to use, and is widely used in monitoring liquid level height. Due to the use of the connector structure, the medium in the container is very easy to flow into the main measuring tube through the connector, so that the liquid level in the measuring tube is always at the same height as the liquid level in the container. At this time, the magnetic float floating on the liquid surface in the float The sensing element can then actuate a flip inside the external indicator to indicate the liquid level. Therefore, in order for the medium to flow smoothly through the small tube of the communicating device and the float to move up and down smoothly without being stuck, it is required that the fluidity of the medium to be measured should be good enough, that is, the viscosity of the medium should not be too large. So what are the requirements for the viscosity of the medium when the magnetic flap level gauge measures? Let's first understand the viscosity of the medium. 1. Knowledge about medium viscosity Viscosity is usually used to represent the fluidity of liquids. Viscosity also varies significantly with temperature. In general, the viscosity of common liquids decreases with increasing temperature, and the viscosity of common gases increases with increasing temperature. The expression methods of viscosity include dynamic viscosity μ, kinematic viscosity υ and relative viscosity. 1. Dynamic viscosity μ, also known as absolute viscosity, represents the internal friction force generated on a unit area when the liquid flows under a unit velocity gradient, the unit is: Pa.S (Pa.s) or P (Poise); 2. Kinematic viscosity υ is the ratio of the dynamic viscosity of the liquid to its density ρ, that is, υ=μ/ρ, in m2/s, or St (St); 3. Relative viscosity, also known as conditional viscosity, is formulated according to certain measurement conditions. Countries such as my country and Germany use Enz viscosity. 2. The requirements of the magnetic flap level gauge for the viscosity of the medium The magnetic flap level gauge must be able to measure smoothly, and the measuring medium must meet certain viscosity requirements. Generally, when the viscosity of the liquid medium is high, the fluidity of the liquid with high viscosity must also be poor. When the liquid flows through the small tube of the connector, it is prone to blockage, or the gap between the inner wall of the float tube and the float is too small. When measuring the medium with high viscosity, the float movement resistance is large, and the float is easily stuck, making the measurement impossible. Therefore, it is required that the viscosity of the liquid medium measured by the magnetic flap level gauge should not be too large, and the viscosity value of the liquid medium is generally required not to exceed 200cP. If the viscosity of the liquid medium to be measured is slightly larger, a magnetic flap level gauge with a steam jacket heating type can be used to heat the liquid medium in the float tube (not suitable for flammable and explosive liquids) to reduce the viscosity of the liquid. The viscosity improves the fluidity of the medium in the float tube, so that the measurement of the performance of the magnetic flap can be carried out normally.
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