Hi,
Has anyone here used the Grove EC Sensor (K=0.981)? I'm having trouble getting accurate readings.
When I apply a scaling factor to calibrate it to a 1413 uS/cm solution, the sensor fails to detect water with a conductivity below 150 uS/cm. On the higher end, for a 12 mS/cm solution, it only reads 9 mS/cm. Any advice on how to fix this issue?
You have to use a calibration curve rather than 1 point calibration. A linear correction with offset is the minimum (2 point calibration).
Good tutorial on sensor calibration: Why Calibrate? | Calibrating Sensors | Adafruit Learning System
Thank you. This works now
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