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Gas Sampling Probes

Interpreting Smoke Signals

| Author / Editor: Herbert Beck* / Wolfgang Ernhofer

( © industrieblick - Fotolia)

Continuous emission monitoring by gas sampling probe — The saying “Every beginning is difficult” means a lot also in the field of Gas sampling probes and probe conditioning: if there is a problem in the direct connection to the process that is to be measured, the entire process analytics will cause problems, either in the calibration of the measured results or during the operation phase.

Continuous Emission Monitoring Systems (CEMS) are facing many challenges at the same time: as a huge difference to the Process Analytic Technology, a CEMS project is often driven by legal requirements and not business case initiated. This circumstance leads into an enormous cost pressure situation: the investment costs have to be optimised but at the same time the operating costs are focussed on the Total Costs of Ownership Calculation. Good to know that the German Company PSG offers a full solution package for gas sampling probes and sample transportation lines.

What is the difference: Not the size matters, but the surface

The main difference of PSG Gas Sampling probes is represented in the inside of the probe: they have the biggest filter surface in the market by far — a very important fact and unique selling proposition for reliable Gas Sampling Probes. The big filter surface allows to reduce the operating costs significantly: the probes continue the measurement when the filter of competitive products have to be changed and cleaned. Next to the reduction of the financial effort in terms of operating costs, another advantage is the high availability which is often required by law and regulations.

The core is the same – the concepts are different

The core inside of a gas sampling probe is the filter itself. The biggest filter surface, the grain size of 0,3 µm and the filter membrane made of mullite grains, provide the best technical prerequisites for an efficient gas sampling process. The difference is to be made by the layout and housing of the filter. Therefore, both PSG Probe product-lines were designed in order to reduce manual service procedures to the minimum and if a manual filter cleaning is unavoidable all service steps are to be handled without the need of additional tools.

Coming from the same origin the two concepts enable to offer a solution for nearly every need: the PSG basic was designed to serve applications with low or medium dust load. The very compact PSG basic Probe unites a unique combination of low investment and operating costs.

Next to this product-line, the PSG Plus probe focuses more complicated applications with middle to extreme dust load. Together with the two back purging options it can easily resist applications with extreme requirements such as waste combustion or cement works.

In order to achieve the main objective in designing a very economical solution without losing the core technical features the layout of the PSG Basic Probe is very compact. The redesign of the probe head represents a very innovative approach: the usage of a flange clamp allows a very compact layout and at the same time, the clamp has another important functions: during the operation it ensures tightness.

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