WIKA offers the appropriate optoelectronic level sensor (also known as an optical sensor for short) for every application. The model OLS-C20 optoelectronic level switch is suitable, due to its compact design, for high-pressure designs. WIKA also offers suitable optoelectronic sensors for refrigeration technology or the shipbuilding industry. The model OLS-C51 level switch, as an explosion-protected version, is suitable for use in extreme environments.