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Does the C-sense need corrections for temperature and total dissolved gas pressure (TDGP)?
The C-sense does not need to be corrected for temperature, it is compensated for in the sensor. However for increased accuracy, it should be corrected for TDGP.   Each C-sense is calibrated at 20 degrees C and an atmospheric pressure at or near 101.3kPa (pressure at the time of calibration is stated on the calibration sheet which ships with the C-sense).   Corrections can be made, assuming TDGP is known, using the equation below.

    pCO2 actual = (pCO2 measured x TDGP) / calibration pressure