KOBOLD Instruments Inc • 1801 Parkway View Drive • 15205 Pittsburgh, PA • Tel: +1 412 788 2830 • E-mail: Please activate JavaScript visit koboldusa.com

dog-4-durchfluss.png: Oscillation Flow Meter for Gases DOG-4/ DOG-6 dog-4-ele-durchfluss.png: Oscillation Flow Meter for Gases DOG-4/ DOG-6

Oscillation Flow Meter for Gases DOG-4/ DOG-6

For dry or wet gases

Measuring range:
0.12 - 12 ... 60 - 6000 m³/h
Connection: flange DN25 ... 200, ANSI 1... 8"
Material: stainless steel
pmax: PN40
tmax: +120°C (Ex +60°C)
Accuracy: ± 1.5 % of reading
Pulse output
Digital display for flow measurement and totaliser
Flow computer with pressure and temperature input


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The KOBOLD flowmeter DOG-4 is used for flow measurement of gases. The medium flows through an orifice in a tube. Bypass bores are located at the sides. The dynamic pressure at the orifice causes part of the gas volumetric flow to flow into the bypass. The division ratio remains constant over the whole measuring range. The bypass channel contains the Oscillator – the Measuring cell itself.

When the gas flows through the measuring cell, a gas column oscillates in a U-shaped channel mounted to the left and right. This oscillation frequency is proportional to  the flow velocity and thus to the total volume flow. The oscillation frequency is sensed with a platinum sensor. An electrical alternating signal is generated that is displayed in the series connected electronics.

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