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Transparent or reflective level gauge?

Which are the differences?

The reflective glass level indicator uses a prismatic slot as a device to reflect light if there is liquid in the chamber. While the transparent level indicator simply sees the actual level of the liquid through the smooth glass. Both are widely used in offshore oil and gas projects, but which one will we use for a specific application?

How do they work?

HOW THEY OBTAIN THE LEVEL OF THE OPERATING FLUID

Principle of operation of the transparent level

In this type of level indicator, the liquid is kept between two smooth glasses. The level can be identified because the fluid has a different type of transparency than gases and steam. The transparent level indicator is especially recommended for applications where it is necessary to protect the glass from corrosive fluids and high temperatures. A lamp can also be installed behind the indicator to improve visibility in special operating conditions.

Principle of operation of the reflective level

The level is determined by a glass that has a smooth side and a wetted prismatic side. The level of the liquid inside the level indicator is shown using the optical principles of refraction: the wet part completely absorbs the light and that is why the liquid appears black. The part that is in contact with the gas, on the other hand, completely reflects the light, so the gas appears to have a very bright color.

Transparent VS reflective

HOW TO USE THE PROPER INDICATOR

TRANSPARENT LEVEL INDICATOR
DS DIESSE

REFLECTIVE LEVEL INDICATOR
DS DIESSE

Neither level indicator is better than the other, both are great devices, the question is choosing the right one. The transparent level indicator is best used in interface liquid applications and also in non-colorless liquids, especially suitable for applications where that the glass must be protected from the corrosive action of the fluid, from high temperatures or for visualization of the interface (level of separation between two immiscible fluids). If our liquid is colorless or clean, then it is recommended to use a reflex type level indicator so that the light is not reflected towards the viewer and the camera goes dark. While if it is used on dirty liquid, the light will be reflected and will not allow the liquid level to be easily seen. For example, to measure the water level of a boiler. In addition, this product has a lower purchase cost and lower maintenance costs. Another smart option is to use a transparent indicator to measure interface liquids, that is, two liquids in the same content but not mixing (such as oil and water). This indicator will allow you to monitor both liquids at the same time.

Quality Made In Italy

DS DIESSE level indicators

Our transparent level indicators and reflective from the Italian brand DS DIESSE have been manufactured and examined according to international standards UNI EN ISO 9001:2015 and manufactured with raw materials from Italy and the rest of Europe. In addition, they also support several additional certified tests including welding, penetrants, Atex, hydrostatic testing and paint control.

 

We hope that this publication will be of help to you, do not hesitate to consult us so that we can study the best solution for your application.

Transparent or reflective level indicator?

 

What differences are there?

The reflective glass level indicator uses a prismatic slot as a device to reflect light if there is liquid in the chamber. While the transparent level indicator simply sees the actual level of the liquid through the flat glass. Both are widely used in offshore oil and gas projects, but which one will we use for a specific application?

How do they work?

HOW THEY OBTAIN THE LEVEL OF THE OPERATING FLUID

Transparent level indicator working principle

In this type of level indicator, the liquid is kept between two smooth glasses. The level can be identified because the fluid has a different type of transparency than gases and steam. The transparent level indicator is especially recommended for applications where it is necessary to protect the glass from corrosive fluids and high temperatures. A lamp can also be installed behind the indicator to improve visibility in special operating conditions.

Working principle of reflective level indicator

The level is determined by aglass that has a smooth side and a wetted prismatic side. The level of the liquid inside the level indicator is shown using the optical principles of refraction: the wet part completely absorbs the light and that is why the liquid appears black. The part that is in contact with the gas, on the other hand, completely reflects the light, so the gas appears to have a very bright color.

Transparent VS reflective

HOW TO USE THE APPROPRIATE INDICATOR

Neither level indicator is better than the other, both are great devices, the question is choosing the right one. Generally, a transparent level indicator will be used as the default option. This is because a transparent level indicator can do what a reflex level indicator does, but not the other way around. The transparent level indicator is best used in interface liquid applications and also in liquids that are not colorless. If you are working with a liquid in which you need to see the color or it is dirty, the best option is the transparent indicator as it allows you to see the level without distortions. If our liquid is colorless, then it is recommended to use a reflex type level indicator so that the light is not reflected towards the viewer and the camera goes dark. While if it is used on dirty liquid, the light will be reflected and will not allow the liquid level to be easily seen. For example, to measure the water level of a boiler. Another smart option is to use a transparent indicator to measure interface liquids, that is, two liquids in the same content but not mixing (such as oil and water). This indicator will allow you to monitor both liquids at the same time.

Quality Made In Italy

DS DIESSE level indicators

Our transparent level indicators and reflective from the Italian brand DS DIESSE have been manufactured and examined according to international standards UNI EN ISO 9001:2015 and manufactured with raw materials from Italy and the rest of Europe. In addition, they also support several additional certified tests including welding, penetrants, Atex, hydrostatic testing and paint control.

 

We hope that this publication will be of help to you, do not hesitate to consult us so that we can study the best solution for your application.

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