The WIKA portfolio of measuring instruments for level monitoring encompasses both continuously measuring instruments and level switches. Depending on the application, different measurement principles are used for level monitoring:
The WIKA portfolio of measuring instruments for level monitoring encompasses both continuously measuring instruments and level switches. Depending on the application, different measurement principles are used for level monitoring.
Limit level switches only indicate when previously defined limit values are reached. These are usually minimum or maximum values. In comparison to level transmitters, the filling height in the container is not measured continuously.
A wide range of measuring technologies are also used for level switches. The following measuring principles can be used for limit level detection:
A wide variety of level switches is available for carrying out such limit value measurements. Each of these switches has its own special properties and application areas and can be used depending on the specific requirements and circumstances. The selection of the appropriate method depends on the type of medium, the temperature, the pressure, the container size and shape as well as the ambient conditions. A proven method to detect the limit level in a container is the use of float switches. With amodel RLS-1000 WIKA float switch, which rises and sinks depending on the filling height, levels can be monitored effectively.
Measurement with optoelectronic switches makes use of optical fibre and optical sensors for the precise detection of liquids in containers. This technology of the WIKA model OLS-2 features high accuracy and reliability, even under demanding conditions such as aggressive media or high pressures. Optoelectronic limit level switches are especially suited for use at very low (-253 °C) or extremely high (450 °C) process temperatures. As optical measuring instruments do not have moving parts, they are low-maintenance and durable, making them a efficient choice for level monitoring.
Magnetic switches for limit level detection are a frequently used solution for adding additional switching points to a magnetic indication. The magnetic switch uses the magnetic field of the float as an activator. When the float with the magnet reaches the previously defined level, the magnetic switch will send an electrical signal. Here, WIKA offers model BGU as a solution for magnetic switches.
Vibrating level switches are also frequently used for limit level detection in industrial applications. The functionality of a vibrating level switch is based on the changing resonance frequency of the tuning fork when the fill level changes. When the fill level reaches the level at which the tuning fork is immersed, the resonance frequency changes, which is then detected by the sensor and triggers a switching signal.
WIKA offers a wide range of products in the level monitoring sector. No matter whether you need float switches, optoelectronic switches, magnetic switches or vibrating level switches, which are directly mounted to the wall of the container – WIKA supplies reliable and precise solutions for various application areas.