Hello mrcrabs thanks for your indication the article is interesting in the case of calibration I think refer to the temperature of 25 ° C and anyway the calibration solutions are stable at the temperature variation (they come in a few pts of pH) I will try to find the solution and if yes, I will sha...

Hello I have read the posts concerning ph calibration by 2 points but i do not understand how to make the correction, i use the equation PH = 7 - (2.5 - SensorValue / 200) / (0.257179 + 0.000941468 * Temperature) With the first calibration point at 7.00ph (offset) I will try asymmetry, so I subtract...

Hello I have a problem with the formula for calculating Ph PH = 7 - (2.5 - SensorValue / 200) / (0.257179 + 0.000941468 * Temperature) I interfaced the 1130 with arduino having a 0-5v input, and from what I saw the 1130 has a 0-5v output, so they are perfectly compatible. In formula, the value "...