Check out post #5 from this thread -> Metering UV Exposures...
Greg (gmikol) says, "NuArc integrators just measure the UV output and slow down or speed up the counter. It does not give a calibrated measurement."
I'd like to understand this a little better myself. Namely, can we reliably convert the NuArc output number into mJ/cm²?
The nutshell of that thread I linked to is about using a UV meter, which outputs in mW/cm². If we multiply that number by seconds, we get millijoules/cm², and this is a measurement of total UV energy absorbed.
If the NuArc integrator gives a reliable number that, coupled with the aid of a UV meter, can lead us to a calibrated measurement, then we'd have a much better idea of the energy requirements for exposing carbon tissue.