Level switches

Level switches are important measuring instruments for monitoring the level of liquids in containers. During level measurement, they detect the exact level of the liquid and,when certain switch points are reached, trigger corresponding signals. They are used in various industries to control processes, to monitor stock levels and to ensure plant safety.

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Where are level switches used?

Level switches are used to monitor liquid levels in containers. They detect switch points and can be used as float switches or level switches. For applications in explosive atmospheres, there are explosion-protected versions, such as, for example, the model OLS-C51 level switch.

How does a level switch with float work?

A level switch detects the liquid level inside of a container. For this purpose, float switches are used, in which the magnet opens or closes one or more reed contacts inside the float, depending on the level. Alternatively, optoelectronic switches are used to monitor the level and detect switch points. Now there are also vibration level switches, which can be found in the WIKA portfolio.

What advantages do level switches offer when monitoring liquids?

Level switches offer a reliable way of monitoring the fill level in containers, thus contributing to safety, efficiency and process monitoring. Due to the precise measurement and detection of switch points, they enable effective control of processes.

What is the difference between a level transmitter and a level switch?

Level transmitters and level switches differ mainly in their functionality and their application area.

Example table
Level transmitter Level switches
Function - Continuous measurement of an entire measuring range
- Emits a continuous measuring signal (0 – 100 %)
- Point-based measurement of one or several levels
- Level switch switches as soon as a level is exceeded or dropped below
Range of use - Continuous monitoring of levels in tanks or containers Stopping a process, e.g. filling, or triggering an alarm
- Overflow control
- Dry run protection (e.g. for pumps)


What is a bypass level indicator?

In a communicating bypass chamber mounted to the side of a vessel a float moves with the level of the medium to be measured. The magnetic field of the radial-symmetric positioned in the float at submersion height activates the magnetic roller displ ...