LLC610D3SH, Liquid Level Sensors +125degC, 4.5-15.4VDC, 1/2"-20 UNF, TTL push-pull, high in air out, polysulfone

Optomax Digital Range of Liquid Level Switches
SST Sensing Optomax Digital Range of Liquid Level Switches are ideal for applications with restricted space that require a miniature, low power and low cost sensing solution. The microcontroller based sensor is solid state, incorporating an infra-red LED and phototransistor which are optically coupled by the tip when the sensor is in air. When the tip is immersed in liquid, the infra-red light from the Optomax Digital sensor escapes making the output change state. The sensor can detect the presence or absence of almost any liquid type; oil or water based. It is insensitive to ambient light and is not affected by foam when in air or by small bubbles when in liquid.