Touch haptics amplitude/intensity - what is the range, and in what units?

Hi - I'm developing an experiment with Quest 2 in Unity that uses haptics with variable intensity. In Unity, we're given a range of 0 to 1, where 1 is the maximum intensity the Touch controller can deliver. I assume this is the same range as we had on the Rift S, where the range was expressed as between 0 and 255.

For my experiment, I really need to know what intensity is being delivered at a given level - eg what is the actual intensity (or the amplitude) of vibrations at 0.2, 0.5 etc in the scale?

In other experiments I've read up, the intensity of a vibration is measured in metres per second per second, which I believe ultimately depends on the amplitude of the vibration (in metres). I've searched the Meta documentation, but can't find any information anywhere - can anyone please tell me the range either of intensity (m/s/s) or amplitude (m). Also, whether the 0 to 1 scale is linear or something else. Alternatively, can anyone point to any documentation that would help, please?