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Optical level sensors
Optical level sensors are devices used to detect the presence or absence of a liquid at a specific point within a container, tank, or vessel. These sensors operate using the principles of light transmission and reflection, making them highly reliable for a wide range of applications where accurate and maintenance-free level detection is required.
How optical level sensors work
Optical level sensors typically consist of an infrared LED and a photodetector. The basic working principle involves the interaction of light with the liquid being monitored:
- Light transmission: The infrared LED emits light into a prism or a small glass or plastic probe that is part of the sensor.
- Light reflection: In the absence of liquid, the light reflects off the internal surfaces of the prism and returns to the photodetector. When the liquid reaches the sensor and immerses the probe, the light is refracted into the liquid rather than reflected back to the detector.
- Detection: The change in the amount of light reaching the photodetector indicates the presence or absence of the liquid. This signal can then be used to trigger alarms, switches, or other control mechanisms.
High-precision
sensors
Highest precision for lowest pressures, reliable MEMS pressure sensors.
Innovative
technologies
Innovative CoBeam²™ technology and dual die technology.
Customised
system solutions
Individual system solutions for perfect integration of measurement technology in sophisticated applications.
Comprehensive
product range
Standard solutions on a modular product platform.