By using a combination of one infrared light transmitter.
Optical infrared water liquid level sensor arduino.
The led is on the blue and red wires blue to 5 vcc.
Optical water level sensor the optical sensor is great as there are no moving parts like all other water floats.
80 epttech fs ir82 ip68 optical infrared water liquid level sensor with magnetic holder replace float sensor 4 6 out of 5 stars 5.
Optical infrared water liquid level sensor 15 jan 07 2018 06 28 am.
I could not find any information how to get these to work after some research i found these have an led and a ldr light sensor nice.
Very accurate and nice little sensors.
The arduino io expansion shield is the best match for this senor connecting to arduino as this liquid sensor is able to work at 3 3v which makes it compatible with raspberry pi intel edison joule and curie.
Epttech food grade optical infrared water liquid level sensor 500mm cable high sensibility working with liquid level controller pack of 3 3 5 out of 5 stars 6 15 80 15.
To ease the difficulty of using this arduino liquid sensor a gravity interface is adapted to allow plug play.
This time i picked a cheap 5 chinese optical liquid level sensor described by most prominent online sellers as 15ma 5v optical infrared water liquid level sensor.
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Arduino forum using arduino project guidance optical infrared water liquid level sensor.