What kind of low cost sensor can be used for a tank fluid level measurement up to about 1m distance, with accuracy of about 5%. Interface to controller can be anything reasonable (SPI, I2C, digital, etc). Some processing is acceptable.
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Have you looked on here before posting? see https://electronics.stackexchange.com/q/424075/152903 – Solar Mike Jan 18 '22 at 20:17
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Ultrasonic sensor is cheap and easy to use. – user263983 Jan 18 '22 at 21:29
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2Does this answer your question? [Sensor For Continuous Water Level Measurement](https://electronics.stackexchange.com/questions/424075/sensor-for-continuous-water-level-measurement) – Elliot Alderson Jan 18 '22 at 21:43