From the datasheet it appears that each sensor of a type has a fixed I2C address, which I assume means that you will not be able to read from each of them individually. Other forum members may know of techniques to achieve this by powering each sensor selectively then reading from it, for instance, but that sounds very clumsy
I assume that you cannot dedicate a separate Arduino to each sensor. If you could then reading 12 sensors with the same address would be possible