Optical Liquid Level Switch

OLS is a compact, microcontroller-based optical sensor that leverages the physics of total internal reflection to detect liquid presence with high precision. In air, light is fully reflected within the prism due to a high angle of incidence. But when liquid makes contact, the change in refractive index causes the light to refract out—triggering an instant state change.

With its intelligent optical detection and zero-moving-part design, OLS delivers reliable, maintenance-free performance in even the harshest environments.