After reading through this thread I think the title might be better phrased as "Enlarger -> Control Strip Maker"
I think the work 'sensitometer' is too vague for the discussion. The word sensitometer includes a variety of instruments from the enlarger PE uses to a mammography department's control-strip maker to a Harvard-Smithsonian tube sensitometer calibrated to an Eppley standard lamp powered by an Eppley standard precision power supply wired in series with a precise 0.1ohm resistor.
The majority of sensitometers on the market are basically control-strip makers. They are very useful tools used to answer common practical questions about processing and used to provide important relative speed information.
The utility of a device for determination of absolute film speed in a home darkroom is zero as far as I am concerned. I can read the number on the film box just as well as anyone. Even if one did have such an instrument and appropriated calibrated lab in which to use it, how would you interpret your results if, for example, Ilford Delta 100 came out faster or slower than 100? Bad film? bad film company? bad calibration? bad day in the lab ?