WIKA optoelectronic switches are high‑precision liquid level limit detectors designed for industrial and process applications. Their operation is based on an infrared LED and phototransistor system, where light is reflected inside a prism when the tip is dry and refracted when liquid covers the sensor tip, triggering a switching signal.

These switches feature no moving parts, ensuring long service life and minimal maintenance. With borosilicate or quartz glass tips and robust stainless steel housings, they offer excellent media compatibility and withstand harsh operating conditions.

The WIKA portfolio includes models for high pressure, high temperature, intrinsically safe Ex‑i environments, refrigeration, and shipbuilding, ensuring a solution for nearly any application. Installation is flexible—vertical, horizontal, or angled—and switching parameters can be adjusted via amplifier modules such as the OSA‑SC.

WIKA optoelectronic switches are widely used in chemical processing, food production, pharmaceuticals, refrigeration systems, and marine applications, providing reliable, power‑efficient level detection even in challenging environments.