Explained for you and illustrated: Our devices are based on the following principles.

Operating principle of variable area / small flow meters

In a conical measuring glass or tube, the float can move freely up and down. The position of the float, which adjusts according to the flow velocity of the medium, is a measure of the volumetric flow rate. This can be read directly from the scale on the measuring glass or tube.

As the volumetric flow increases, the annular gap area A around the float’s collar increases (A2 > A1).

The SKM device is a piston flow meter: the position of the spring-loaded piston, which changes depending on the flowing medium, is a measure of the flow rate and can be read directly from the scale. Due to the spring loading, the device can also be used for flow directions from top to bottom, right to left, and left to right.

Operating principle of flap-type flow meters

The primary measuring element of the flow meters is a flap that is deflected by the flowing medium. The angle of deflection is a direct measure of the flow through the pipeline.

In the KLA model, the flap is gravity-loaded; therefore, measurements are possible in flow directions from left to right, right to left, or bottom to top.

In the KLA-GS version, the flowing medium can be directly observed through a sight glass.

In the KFS model, the flap is spring-loaded, allowing the device to be used also for flow direction from top to bottom.

Operating principle of differential pressure flow meters

A differential pressure is generated at a pipe constriction, which is proportional to the square of the volumetric flow rate through the pipeline. The resulting differential pressure is measured and can be displayed directly on a scale as volumetric flow.

Operating principle of bypass flow meters

In bypass flow meters, a secondary flow proportional to the main flow is generated. This bypass flow serves as a measure of the volumetric flow in the main line and can be read directly on the scale.

Operating principle of level indicators

Consisting of an indicator unit, connection flange, float tube, and float, the NA serves as a level indicator for, for example, underground liquid tanks. The float tube is inserted into the tank from above and welded in place. The float is firmly connected via a connecting rod to the magnetic carrier in the indicator unit. As the level in the tank rises, the float and rod are pushed upward by buoyancy, allowing the level to be read.

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