This Wejex Model S sensitometer works and is in good condition. It has some minor cosmetic marks, but is in fine shape otherwise.
The inside is very clean also.
It is a 6" black cube, that runs on AC power.
It has a 21 density step tablet built in.
A small incandescent bulb produces 2.5 second exposures.
The original instructions and parts list are included.
$95 + $10 shipping. US only.