Shaking bones

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The shaking bone is a handheld measuring device for determining the carbon dioxide content during smoke gas analysis .

application

The shaking bone is filled with potassium hydroxide for measuring the CO ₂ content or with pyrogallol for the O ₂ measurement. It used to be part of the equipment of a chimney sweep .

The application for the simple determination of the methane content of biogas is, in the opinion of experts, to be regarded as an unreliable method, since the equation "100 minus carbon dioxide equals methane" is incorrect in the frequently used desulfurization by adding air because of the remaining nitrogen content.

etymology

The name "Schüttelbochen" comes from the fact that the elongated cylinder with its two thick end pieces looks like a bone. To perform the measurement, the liquid inside the transparent cylinder must be set in motion by shaking.