@Jazim Schail. Do you really want to window your signal? Is your goal to use a window sequence to reduce FFT spectral leakage?
Because window sequences are so heavily discussed in the tutorial literature of spectrum analysis I'm afraid many DSP beginners fall into the trap of thinking all signal sequences should be windowed before they are applied to an FFT. This is not true.
Windowing should only be used when your goal is to monitor (measure) a low-magnitude "spectral component of interest" that is located nearby-in-frequency to a high-magnitude spectral component in which you are not interested. In that case, the high spectral sidelobe components of the high-magnitude signal are covering up (masking, obscuring) the nearby low-magnitude signal's spectral components that you want to monitor. In this case windowing is appropriate to reduce the sidelobe levels of the high-magnitude unwanted signal.
Jazim, does the above scenario describe your spectrum analysis activity? If so then just use a "periodic" Hann (Hanning) window, not the "symmetrical" Hann window. If spectral leakage reduction is NOT your goal, then do not window your sensor signals.
In any case, I suggest you do not window the sensor signal with an asymmetrical window sequence. I believe doing so would result in a "smeared" (distorted) spectrum which would be difficult to interpret correctly.