Optomax Digital Liquid Level Sensor

Electronics and water don't usually mix - which is why liquid level sensing projects can be a little challenging. You can DIY a sensor but keeping it clean and un-oxidized can be a pain.

Blue/Black wire
Ground lead. Adafruit product page says to connect the Blue/Black wire to ground.
Type · groundVoltage · 0V / ground
Red wire
Supply lead. Adafruit product page says to connect the Red wire to 4.5-15.4VDC.
Type · powerVoltage · 4.5-15.4VDC
Output wire
Push-pull logic-level liquid-detect output. Adafruit states dry output is the same as the red wire and wet output is 0V; output can sink/source up to 100mA.
Type · signalVoltage · 0V when wet; same as red supply when dry; supply range 4.5-15.4VDC

Pin	Position	Type	Function	Voltage
Blue/Black wire

Start wiring

0V / ground · 4.5-15.4VDC

Verify supply voltage and logic levels before powering up.

Module pins: Red wire, Blue/Black wire, Output wire. Schematik maps them to your board in the app.

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Pinout

Start wiring

Air quality

Temp and humidity

Environment sensors

Light and colour