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Sensor principles explained

Sensor principles explained

Many of our handheld devices work with different sensors to measure gas and pressure. We will explain these different sensor principles here: Infrared sensor (IR-sensor) An infrared sensor measures wavelengths that are not visible to humans because they are below the red light visible to humans....

Reading time: 10 min

Author: Lea Schwenen

Gas leak detection: Measurement in PPM range or LEL?

Gas leak detection: Measurement in PPM range or LEL?

Pipeline network inspection – Gas leak detection with carpet probe and triangle probe In our last blog post LEL versus PPM we looked at the differences between the two measuring ranges and noted that the ppm range is generally used to detect the smallest concentrations. This is the case...

Reading time: 6 min

Author: Bernd Esders

LEL versus PPM

LEL versus PPM

– The basics of measuring ranges – The abbreviation LEL stands for Lower Explosion Limit and it corresponds to the concentration of a substance in the air above which there is a risk of explosion. The LEL of flammable gases such as methane, ethane, propane and butane is relevant for us;...

Reading time: 4 min

Author: Lea Schwenen

Inaccessible service line connections

Inaccessible service line connections

When inspecting gas pipeline networks, inaccessible service line connections are a problem that causes a lot of trouble and it is time consuming. Times have changed here. In the past, there were hardly any problems to enter properties in rural areas; rarely were the properties completely fenced...

Reading time: 4 min

Author: Bernd Esders

Gas detection vehicles

Gas detection vehicles

Vehicle-based inspection of gas pipes The revision of the G 465 in the German DVGW rules and regulations has resulted in a number of alterations. For example, the vehicle-based inspection of gas pipelines located on roads has been included for the first time. For us, this means that it will be...

Reading time: 5 min

Author: Bernd Esders

Basics – Pressure tests on gas pipelines

Basics – Pressure tests on gas pipelines

– Physical properties of a gas – gases heat up during compression – For pressure tests on gas pipelines, which are carried out with air or nitrogen, there are some physical effects, which we will try to explain here in a very simple way. Physical properties of gas: If the...

Reading time: 3 min

Author: Bernd Esders

Applying logic during gas leak detection

20. February 2020

Applying logic during gas leak detection

From my experience and point of view, many tasks in inspecting gas pipeline networks can be accomplished with the application of basic knowledge and logic. For example, I can remember a visit to China, where we presented our range of devices for the first time at a major gas network operator. As...

Reading time: 5 min

Author: Bernd Esders

Gas leak detection with bell probe – best practice

07. February 2020

Gas leak detection with bell probe – best practice

– A field test with OLLI and bell probe – Our customers often ask us about the different probes available. While in Germany and the neighbouring countries it is a standard procedure to use carpet probes in urban areas with paved surfaces and the bell probe in unpaved areas, such...

Reading time: 5 min

Author: Bernd Esders

Correlation in our daily work

17. October 2019

Correlation in our daily work

If there is a leak outside the measuring section, the noise must always pass through the entire measuring section. It does not matter how far outside of the measuring section the leak is. If the sound velocity V is entered correctly, the result will always be L = 0.

Reading time: 4 min

Author: Bernd Esders