Flow measurements

Product catalog summary

Overview
EM-Technik GmbH provides flow meters based on the float principle, suitable for precise measurement of gases and liquids. Custom measuring ranges and types are available upon request.

Specifications
The flow meters are available in various types and configurations, including wall, panel, and inline installations. They feature different measuring tube sizes and flow ranges for air and water, with materials such as PP, PVDF, and PFA. Some models come with a standard valve, while others offer optional measurement transmission features like reed switches.

Measurement Principle
The float principle involves the equilibrium of forces acting on a float within a conical measuring cylinder. The float's position, which corresponds to a specific volumetric flow rate, is read on the measuring tube's scale.

Materials and Construction
Measuring tubes are primarily made of Duran® glass, known for its high corrosion resistance and temperature change resistance. Floats can be made from materials like PTFE, PVDF, glass, stainless steel, or mu metal, depending on the application.

Customization
Special measuring tubes can be manufactured for specific applications, requiring detailed data on media, pressure, temperature, and other factors.

Regulation Valve
Most flow meters include a fine control valve, except for certain models. The valve's flow rate characteristics are tailored to the specific flow rate.

Accuracy
Accuracy classes are defined according to VDI/VDE 3513 standards, with different classes based on the measuring tube's dimensions.

Catalog excerpts

Flow measurements Our flow meters use the float principle and are suitable for exact measurement of gaseous and liquids. In addition to the extensive standard assortment, individual measuring ranges and different types of measurement acquisition are also possible on request. Type Installation Meas. Tube Size mm Flow range air Flow range water Connection Material As standard with valve Measurement trans *Glass change in installed state W = wall mounting, S = panel mounting, R = inline installation, St = standard measuring tube, So = special measuring tube EM-Technik GmbH - IndustriestraGe 2 - 67133 Maxdorf - Germany [email protected]

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The emtechnik flow meters are based on the float principle. The flow rate measurement is given by the relation between the force of gravity on the float and the flow velocity of the medium inside the measuring tube. At a constant flow velocity the float stabilises at a specific height within the conical measuring cylinder. In this position the forces acting on the float are in equilibrium. This means that the weight force (G) of the float is raised by the buoyancy force (A), the amount of media displaced by the float and the flow force (K) caused by the flow (G=A+K). If the flow velocity changes...

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Float table EM-Technik GmbH - IndustriestraGe 2 - 67133 Maxdorf - Germany [email protected]

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The product advantages of the series Measuring tube and float The measuring tubes that are used are mostly made of Duran® glass and correspond to accuracy classes 2.5 according to VDI/VDE 3513. Duran® glass has high corrosion resistance against almost all measuring material with the exception of hot concentrated lyes or hydrofluoric acid. The high boron trioxide content ensures a high temperature change resistance, so that its coefficient of linear expansion is only 3.2 x 10-6 m/1°C. For easy flow rate measurements of air in which media resistance is not a key consideration, we also offer flow...

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The regulation valve emtechnik flow meters come standard with a fine control valve (except 4M, 4N, 4T). The flow rate characteristics of the valve are aligned to the respective flow rate. A design without valve is also possible on request. Accuracy classes according to VDI/VDE 3513 Measuring tube 0 x length Class % of final value min/max EM-Technik GmbH - IndustriestraGe 2 - 67133 Maxdorf - Germany [email protected]

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All EM-Technik GmbH catalogs and technical brochures

Product brochure emtechnik
44 Pages