u/Malow

Hi, im making a device (esp32 based) to make simple the measurement of superheat. clamp to get return temps, use a simple analog manometer to get pressure, and the device calculate based on the pressure you set and temps it read from the probe,

the problem is: i was looking at graphs on the pressure/temp charts for various refrigerants, and the conversion does not is a simple linear or logarithmic scale, is more complex, and i can't seem to find the math formula on conversion.

i was trying to get the math to have precision, and avoid using a lookup table to get the values for the most used refrigerants here (R22, R410a, R32, R404, R600a, etc...)

any help appreciated, thanks! (btw, im in brazil, whe use Celsius)