Learn about different types of gauges and their working principles

by Aqua Logistics ceo

If you want to conserve water or any liquid, you need to measure the level first. If we talk about water, we use it countless times in a day, without even knowing the capacity. But, in some cases, you need to maintain the minimum amount of water on the reserves or the tanks and to do that, you will need a gauge. Gauge or level gauge is a type of device that allows you to check the fluid level. You can select different types of gauges for different applications, where you the accurate measures.

Different types of gauges

Gauges are usually made using metal that has an internal room with windows. You will find strong glass with sealed joints that has high durability to withstand the water pressure.

You can use level devices if you have the following conditions,

Surface position of the liquid
Head pressure
Material pressure

You will find 3 most common level devices,

Reflex level device
Transparent level device
Magnetic type-level device

Reflex level device

The working principle of a reflex type level gauge is very similar to the light refraction and reflection. To learn about the reflex level gauge, we need to discuss about the liquid zone and gas zone.

Gas zone

If you have ever seen a reflex level gauge in working condition, the silver bright zone indicates the gas. The angle of a gas zone is much lower than the liquid zone and that is why instead of refracting, the light gets reflected at a 90-degree angle. This way, the light will be reflected towards the onlooker at 90 degrees straight.

Liquid zone

While the work is in progress this area appears to be dark to the spectator as in this case the rays fall at a 45-degree angle. In the liquid zone, the rays get refracted in the liquid, but as the internal walls of the chamber aren’t reflecting, the spectator cannot see the rays from outside. So, if you were curious, why the liquid zone is dark or completely black, this is the reason.

Applications

· It can be used in the most fluid application, unless you need to measure two different types of liquids or if the fluid is in high pressure

Transparent level device

This type of level device is always fitted between the juxtaposing glasses and to provide better visibility the transparent glasses are used. Mica shields are used in a transparent level gauge to ensure the safety of the glass surface. That is why these types of level devices are only used if the fluid is corrosive and the temperature is too high.

Applications

Corrosive fluid
To keep track of the interface
To keep track of the color
The pressure is more than 20bar
If you need thermal shocks

Magnetic type-level device

Magnetic level device is used to provide protection

against leakage
environmental safety
accurately running application
pollutants
harmful gases
explosives etc

It is very easy to understand the working principle of magnetic type level devices as it follows some common rules of physics. So, if you know the rules of Archimedes where he talked about the principles of buoyancy, it will be easier for you to understand. There is a float in the chamber that moves up and down to indicate how much gas is been used.

Applications