Operating principle of sensors for level measurement
The level of media can be measured to different operating principles. Two of the most relevant ones in industry are presented below.
Capacitive level measurement
On the one hand there is level measurement by means of capacitive sensors. These sensors are based on the capacitor principle and generate an electrical field at the active zone. The medium to be detected (dielectric material) increases the capacitance which leads to a change in the output status of the sensor. The level is determined either without direct contact with the medium, e.g. through non-metallic tank walls or on bypass pipes (capacitive sensors) or in direct contact with the medium on the active face (capacitive limit sensors).
Conventional level sensors operating to the pulse transit time principle
The use of conventional level sensors is another option to determine the level. The sensor operates to the principle of guided wave radar and belongs to the process sensors. The level is measured by direct contact with the medium and using electromagnetic pulses in the nanosecond range.
Possible applications for level sensors are:
- Level monitoring of water and hydrous media
- Level monitoring of oils in machine and plant construction
- Measurement of cleaning liquid and coolant levels
Order level sensors online from Automation24
Automation24 offers many level sensors at low prices. One of the top manufacturers in this field is ifm electronic on which our product selection is focussed. We offer both capacitive point level sensors and conventional level sensors operating to the time-of-flight principle (TDR). Simply select your technical requirements using our filter option to find your suitable level senors.
At Automation24 you find a selection of sensors for level measurement at very favourable prices. Select the sensor suitable for you application now!