TDS calculation compensation values
Andres.Rico 2023-04-25 10:18:58 545 Views2 Replies Where do the compensation values (133.42, 255.86 and 857.39) for Electric Conductivity calculation come from in the TDS library?
tdsValue=(133.42*compensationVolatge*compensationVolatge*compensationVolatge - 255.86*compensationVolatge*compensationVolatge + 857.39*compensationVolatge)*0.5; //convert voltage value to tds value
Getting line of code from https://wiki.dfrobot.com/Gravity__Analog_TDS_Sensor___Meter_For_Arduino_SKU__SEN0244#target_5
I am agreed with the above answer. I used this TDS sensor. This sensor is good for a comparitive approach of measurement. It can distinguish between clean water and contaminated water. But for precise measurement, this may not be the best choice.
bidrohini.bidrohini This is just a conversion formula, these three values have no practical meaningThis kind of analog sensor generally records the original output voltage and the actual TDS value at the same time (the TDS value may be recorded with another more accurate TDS meter), and enters these two values into a specific software (such as MATLAB) and then Fit a suitable formula.
Yeez_B 
