Operating principles

Here are the various processes that underlie our devices, explained and illustrated graphically.

Operating principle variable area/short tube variable area flow meters

The float can easily move up and down in the conical measuring tube. The vertical position of the float, obtained as a function of the flow velocity of the measuring media, is an indication of the flow rate. This flow rate can be directly read off the scale of the measuring tube.
With increasing volume flow, the annular gap surface area A around the collar of the float increases (A2 > A1).

In the SGM the vertical position of the float is magnetically transferred to the pointer.

The SKM is a piston-type flow meter: The position of the spring-loaded piston changes depending on the medium flow. It is an indication of the flow rate and can be read directly off the scale. The piston is spring-loaded, thus the unit can also be used for the flow directions top to bottom, right to left and left to right.

Operating principle flap-type flow meters

The primary measuring element of the flow meters is a flap, which is deflected by the flow of the medium. The deflection angle is a direct indication of the flow through the pipe.

In the KLA the flap is gravity-loaded, thus the device can be used for the flow directions left to right, right to left and bottom to top.

In the variant KLA-GS the medium be measured is directly visible through a glass in the flow indication unit.

ln the KFS the flap is spring-loaded so that the device can also be applied on tubes with the flow direction top to bottom.

Operating principle differential pressure flow meters

A differential pressure arises at a pipe constriction, which is proportional to the square of the flow rate through the pipe. The resulting differential pressure can be recorded with a meter and can be directly indicated as flow rate on a scale.

Operating principle bypass flow meters

The flow running through the bypass is proportional to the full flow of the mainstream and senes the flow meter to generate the indicated value.

Operating principle level indicator

The level indicator NA consists of a display part, a pipe and a float which are installed in the tank. The float is permanently connected via a connecting rod to the magnet holder in the display part. When the level in the tank rises, the float and the rod are forced upwards by the buoyancy force, and the filling level can be read from the display.

The level indicator NA-V4A operates on the principle of communicating vessels, and is mounted outside the tank. It is connected to the tank via a feed pipe and an overflow. When the filling level in the tank rises, it also rises in the measuring tube.